new options: jpeg quality, pixel range, negative image.
new files: fits2jpeg.h, image.c (image ops) and messages.c
new files: fits2jpeg.h, image.c (image ops) and messages.c
further changes..
v2.0 Testing - Merged scale and enhancement operations to single block
A few changes in build scripts to handle doc paths
Fixed a few typos and URLs
Shifted configure.in to configure.ac
added .gitignore
Initial release v1.0