[Ohrrpgce] SVN: teeemcee/8632 slices: Fix up SetSpriteToFrame to support custom palettes or unpaletted

[subversion at HamsterRepublic.com]

teeemcee
2017-04-15 06:06:46 -0700 (Sat, 15 Apr 2017)
255
slices: Fix up SetSpriteToFrame to support custom palettes or unpaletted Frames

Also fix up other code to support 'Frame' slices so that they're no longer
just a hack. They probably could be used in-game now. However, they still can't
be saved or loaded.
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U   wip/scriptcommands.bas
U   wip/slices.bas
U   wip/slices.bi
U   wip/subs.rbas