[Ohrrpgce] SVN: teeemcee/7282 plotdict: mention undocumented root,special,map slices; sliceisgrid|sele

[subversion at HamsterRepublic.com]

teeemcee
2015-06-14 03:49:09 -0700 (Sun, 14 Jun 2015)
204
plotdict: mention undocumented root,special,map slices; sliceisgrid|select were in wrong section

Also made the sliceisX descriptions consistent, and mentioned that
they don't accept invalid slice handles
---
U   wip/docs/plotdict.xml
U   wip/docs/plotdictionary.html