Clean up ans_matrix in AnswerChecker.pm (mostlu cosmetic, but removes double underscore from answer extension names).
Make MultiAnswer use name prefixes that include the answer name for the initial blank (so that color.js can track them properly).  This removes the count, and makes more heavy use of the named answer rules and arrays.
Make PopUp and RadioButtons objects work properly with the new MultiAnswer name prefixes.  (These didn't work with singleResult=>1 in the past, but now do.)
Don't need quiz prefix since it is part of the ans_name now.  Fix entry_check to work with scaffolding macros.
Fix problem with unnamed answer rules in PopUp menus.
Merge pull request #146 from dpvc/patch-input-colors

Patch input colors
Make COMMENTS from a given pg file accumulate and show them all,
(as opposed to only showing the last one).
Merge pull request #152 from jwj61/develop

Make COMMENTS from a given pg file accumulate and show them all,

This is a small change.  I tested that in the library browser without this pull request only the last comment is shown and after all of the comments are shown.