Stuff to add to vimage:
Add support for TIFF 6.0, RLE, PCX, IFF
Finish support for Sun Rasterfiles, Targa and PBM
Improve speed of Heckbert median cut algorithm and resultant image quality.
Improve console switching.

Fix slide file reader to strip leading and trailing spaces.
Have slide file reader accept ~ to mean the user's home directory.

Add command-line gamma correction switch.

Add more functions to file selector.

Add scrolling for larger-than-screen pics
Add color correction capabilities (this option is not very useful
  unless we can save).
Add cropping capabilities (ditto previous comment)
