1.61-2


	- [NEW] New tool 'difference' added enabling differencing two images.
	When the option '-show' is given, the difference image is displayed
	rather than written as '<sourcename>.diff.fits'.
	Both images can receive additional options via 'imagetool'.
	E.g.

	 > ./difference -show -smooth=9.0 first.fits -extFilter=90.0 second.fits
	
	will display the difference between 'firts.fits' (smoothed to 9") and
	'second.fits' (no smoothing by filtering over 90")...
	
	- [MINOR] imagetool's noise clipping is now via '-maxNoise=X' option
	where X specifies the passing dynamic range of noise. E.g. 
	  
	  > ./imagetool -maxNoise=3.0 myimage.fits

	will only keep the part of 'myimage.fits' where the rms noise level 
	does not exceed 3-times the least noisy part of the map. 
	
	- [IMPROVEMENT] Source extraction uses finer regrid (to beam/5), which
	should improve the reliable extraction of *ALL* sources near the
	detection limit, albeit at the price of slower execution...

	- [IMPROVEMENT] Implemented the slower but more accurate regridding 
	routine. The resulting maps are now free from regridding artefacts! :-)

	- [COSMETIC] Reverted to old contrast adjustment method in linear 
	and sqrt scaling modes. This adjustment is available via the keys 'C'
	and 'c' in 'show'. The old-new method turns up or down the contrast
	around the zero level...

	- [COSMETIC] Small corrections (e.g. typos) to console output.

	- [COSMETIC] The printing of angles no longer uses symbols since
	the degree symbol does not show on all terminal types. Thus, reverted
	to more simple dms formatting to be more standard ASCII compliant.

	- [COSMETIC] Updated information screens for all crush tools. These
	used to tell that these tools were for SHARC2 maps, but by now they
	can handle all CRUSH maps (including from minicrush) and others as
	well (e.g. from BoA, or single FITS images).

1.61-1
1.61-b2

	- When masks are defined and displayed, the names are also shown.
	The name labels can be switched on and off using the 'n' key in
	display mode ('show').
	
	- Added capability of stacking sources with 'imagetool' via the 
	'-stack=' option. The argument is the source catalog to be used
	in the same format as mask files (see 'mask.example'). The output
	filename is changed, by default, from '[somename].fits' to 
	'[somename].stacked.fits'.

	- [BUG] Regridding images via imagetool could produced small 
	astrometric shifts. Regridding has been entirely rewritten. The new
	routine results in preserved astrometry and is also faster. Some
	minor regriding artefacts may be produced due to rounding issues.
	The elimination of these would slow down the routine considerably
	and it is therefore not implemented (at this point...).

	- [BUG] 'coadd -offsets' malfunctioned due to an initialization error
	of the amoeba minimizer. This has been corrected and the chi2 minimizer
	has been generally improved.

1.61-b1

	- Switched to nom.tam.fits v0.99-5 Java FITS libraries. This should 
	eliminate a host of FITS problems (e.g. too long value fields for some
	numbers for the liking of GREG even though it is entirely FITS
	standard, and only GREG seems to have trouble supporting it...).

	- [NEW] 'show' display tool can now toggle between linear, logarithmic
	and square-root scaling using the 'x' key. Enjoy! :-)

	- [CHANGE] All image reads now automatically change the working
	directory to the location of the image. Thus, when an output
	name is specified via -name= option, the resulting output will
	be written to the same location as the input image was read from.
	Another effect is that mask files can also be specified relative
	to the path of the image fro which they are applied to. This 
	should add convenience of use...

	- [NEW] Added capability to read single image FITS files (flux
	images). This new feature is still in development, so it may not 
	be very chiseled at the moment. A few warnings to bear in mind:

	   * Presently the reading assumes that the map is in units of
	     Jy/beam. Apply any necessary scaling via -scale= to bring the
	     map inot these units, if you mean to use them...

	   * If BMAJ (specifying a beam major axis in radians) or BEAM
	     (doing the same in arcsecs) is not present in the FITS
	     header, then Nyquist sampling is assumed (i.e. half beam
	     pixelization).

	   * If SMOOTH keyword, specifying smoothing FWHM in arcsec is
	     not present, then unsmoothed images are assumed.

	   * An algorithm tries to guess the noise from the FITS image
	     itself. This algorithm will probably evolve over time...

	- [FIX] Reading and writing files with crush may not have worked
	on Windows platforms because of some hard-coded Unit style path
	specifications. My apologies if this affected you. Unfortunately
	I do (did) very little Windows testing, so if you have comments
	on crush under Windows, please tell me :-).

	- [FIX] Convolution related operations (smoothing, filtering and
	deconvolution) used slightly too small beam patches. This may have
	resulted in images under these operations that were a bit 'edgy'
	but otherwise caused no harm.

