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))

	to
	  	
	   H = sum_i sgn(X_i) * (1 + A_i / sigma_i) * log(X_i)
	
	where

	   X_i = (A_i^2 + sigma_i^2)/(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).

