[Ohrrpgce] SVN: teeemcee/9517 Add "slice is map layer" command, and a section in the plotdict explaini

[subversion at HamsterRepublic.com]

teeemcee
2017-09-30 06:56:53 -0700 (Sat, 30 Sep 2017)
235
Add "slice is map layer" command, and a section in the plotdict explaining map layer slices

I decided to call it "map layer" instead of "map" because that's more accurate
and we could conceivable even have separate Map slices someday.
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U   wip/const.bi
U   wip/docs/plotdict.xml
U   wip/plotscr.hsd
U   wip/scriptcommands.bas