cmRST: Add support for the note and productionlist directives

Simply print out the lines as normal paragraph text.  Teach the
CMakeLib.testRST test to cover this syntax.  Update the
cmake-developer.7 manual to document support for the directives.
Merge topic 'doc-rst-note-and-productionlist' into next

450b515 cmRST: Add support for the note and productionlist directives