[Ohrrpgce] SVN: teeemcee/8344 If gifsicle is available, use it to compress .gifs after recording them

[subversion at HamsterRepublic.com]

teeemcee
2017-01-24 21:31:38 -0800 (Tue, 24 Jan 2017)
490
If gifsicle is available, use it to compress .gifs after recording them

gifsicle is run asynchronously and invisibly in the background
using open_process(), and might take up to ~10s or more for big files.

Although gif.h implements both delta-coding and LZW compression, there
are a lot of tricks that can be used to compress further, like only
outputting dirty rectangles.
Depending on the gif, gifsicle can reduce the size from 20-80%.
Recordings of Custom tend to compress much better.
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U   wip/allmodex.bas