LRDOCS-857: Not all portlets can be configured within a customizable region.
Address in-line comments
End section with transition rather than a note
Merge pull request #796 from jhinkey/transitions-dg

Tools Chapter Transitions
LRDOCS-857: Clarification for configurable instanceable portlets
LRDOCS-857: Wordsmith
Merge branch 'LRDOCS-857' of git://github.com/codyhoag/liferay-docs into guidelines
Fixed description of why custom regions only affect instanceable
portlets.