1.62-4

	- [NEW] Introduced key "SHOW_FINAL_MAP = <boolean>" and the 
	corresponding command-line options '-show' and '-noshow' that can be
	used to control whether the final map is displayed after reduction
	or not. E.g., point.cfg has SHOW_FINAL_MAP enabled, so that the
	pointing image is displayed immediately after reduction. However,
	this may not be desired, when one is observing remotely for example.
	By reducing with 
	
		crush -point -noshow ...
	
	One gets the information on the pointing fit on the console output
	but crush will not attempt displaying the image on screen.

	- [NEW] Added new FITS keyword 'INTEGRTN' describing the total 
	integration time (in seconds) for the map.

	- [BUG] Source extraction via 'detect' broken in prior release due
	to some code changes relating to Regions.

	- [CHANGE] At last, the Mai-Tau server on fangorn is made to autostart.
	Due to this long desired and welcome change, 'fangorn' is reinstated as
	the MaiTau lookup server (it was changed to 'submm' in 1.62-2)... 

	- [CHANGE] Slight modification to the output of 'calibrate'. Focus
	is now written as X-position,dY,dZ, rather then the three aboslute
	positions before.

	 - [CHANGE] Further changes to MEM. The target model used to be a
        beam-smoothed version of the map. This means that the MEM solution
        is subjected to very much the same artefacts (e.g. negative lobes)
        that affect the maximum-likelihood maps.
        From now, a more extremely smoothed map is used (with 5 beam widths),
        which should provide more realistic behaviour for low signal-to-noise
        signals both when a faint extended emission is present or with flat
        (zero) backgrounds.

	- [FIX] When 'difference' was invoked with '-show' it displayed the
	difference image twice. Oh, better this than not displaying at all :-)
	Now, it's back to a more singular displaying behaviour... 

	- [TUNE] Fine-tuned source fitting by providing a smoother chi^2
	surface when parameters hit hard limits...


1.62-3

	- [NEW] At last, crush can be run from outside its directory on UNIX
	systems (e.g. Linux, Solaris or MacOS). You can also install symlinks
	of the executables into a directory that is in your path for 
	convenient access. Just run 'install.sh' and follow the instructions. 	

	- [BUG] Highpass filtering via -hipass=X was badly broken for a while.
	This was always meant as a non-standard experimental feature. The
	preferred way of achieving highpass filtering of the time-streams is
	via the drift modeling, where the filter timescale is set by the
	-driftT=N option where N specyfies the timescale as a number of
	frames. The new highpass filter is more graceful with a Gaussian
	tapered frequency response. This should alleviate possible sidelobe
	structures.

	- [CHANGE] Previously many low resolution signal models were disabled 
	after highpass filtering. This was basede on the assumption that the
	filter perfectly deals with any noise sources on these longer 
	timescales. This, however, ignores the fact that noise models have
	interference with the source, so as better and better source models
	are available, some low frequency noise will seep back from the
	'rejected' source structures. Thus, the pipeline is now unaffected
	by the presence (or absence) of highpass-filtering.

	- [UPDATE] Updated configuration files 'bright.cfg' and 'point.cfg'.

1.62-2

	- [BUG] 'crush -log=<filename' option for creating simple ascii logs
	for scans was broken, probably resulting from the FITS library update
	of version 1.60. It's fixed and made faster by skipping the processing
	of unnecessary HDUs.

	- [BUG] 'calibrate' aperture fluxes were left in V units, resulting
	from a recent change in the prior version. This is now corrected.

	- [FIX] In the previous version, the 'show' display had conflicted 
	interpretation of 'p' which was originally for performing 'pointing'
	but has been overriden for towggling polygonal drawing mode. This
	is now resolved with the following keystrokes interpreted as:

		'p'	Performs pointing fit.
		'P'	Toggle polynomial/circular drawing mode.
 		'R'     Remove all regions (circles and polygons)

	- [CHANGE] MEM correction is now applied after all other 
	post-processing steps. All steps are performed, including smoothing.
	The MEM target model is generated from the beam-smoothed processed map
	by enforcing positivity.

	- [CHANGE] Revisited MEM algorithm. Changed entropy deifintion from
	
	   H = - sum_i (1+A_i/sigma_i) log((A_i+sigma_i) / (T_i+sigma_i) - 1)

	to
	  	
	   H = - sum_i sqrt(1 + A_i^2 / sigma_i^2) * log(X_i - 1)
	
	where

	   X_i = sqrt(A_i^2 + sigma_i^2)/sqrt(T_i^2 + sigma_i^2)

	This definition has the following advantages over the original one:

		* Works for both positive and negative signals and models
		* lambda > 0 assures convergence towards the model
		* No need for explicit positivity regularization
	
	Ad a result of the last property, the previously introduced
	MEM_POSITIVITY key and -positivity option have been abandoned.

	- [CHANGE] MaiTau server changed to 'submm.caltech.edu'. The old server
	'fangorn.submm.caltech.edu' remains running in parallel for a while
	supporting older crush releases.

	
1.62-1

	- [BUG] 'crush -point' had a bug suggesting wrong FAZO offsets. Yet 
	another bug left over from the projection update...

	- [CHANGE] 'Jy/beam' is now the default output. However, beware that
	this is uncalibrated until you reduce with a proper tau value and
	apply any residual calibration scalings via -scale=X...
	
	- [CHANGE] Default projection is changed to 'GLS' mainly because it
	is the fastest to calculate and is widely supported. You can always
	change the map projection with the '-projection=<name>' option. See
	'change.log' for 1.60-1 for the list of other projections currently
	supported...

	- [NEW] Added support for polygonal regions. These can be drawn on the 
	'show' display by pressing 'p' to start and again to complete a 
	polygonal region.
	Add vertexes with the left mouse button, or remove them one by one 
	with the right mouse button. Alternatively, vertexes can be listed
	as coordinates (equatorial or horizontal depending on the map 
	orientation) in a file.
	Pressing 'P' can be used to flush all polygons. 
	
	- [NEW] 'show' can now measure the rms values inside regions (circular
	or polygon) by pressing 'N'.

	- [NEW] More control offered over MEM mapping. The configuration key
	MEM_POSITIVITY and equivalent option '-positivity=<name>' can be used
	to specify what method is used to ensure positivity, which is required
	for the MEM method to work. The following values are supported:

		clip		Set all negative fluxes to 0.
		absolute	Use absolute values of fluxes.
		squares 	Use the sqaures of the flux values.

	The default is 'absolute' (see crush.cfg).

	- [FIX] 'crush -point' display was not autoscaled due to some recent
	changes.

	- [CLEANUP] Removed some unused old code (Should have no effect).

