Added href to knowl links
Changed pts to points
First attempt at adding aria labels
Added BLABEL and ELABEL
Increased aria support
Added aria-labels to matrix answers
Merge branch 'patch-input-colors' of http://github.com/dpvc/pg into access

Conflicts:
	lib/Value/AnswerChecker.pm
Added aria label support for multianswers
Polish after whitebox testing.  Added missing BBOLD and EBOLD stuff.
Upgraded aria labelling so it works with matricies inside multianswer
Fixed ans_array to work properly with multianswer.  Did some double checking just to make sure.
Merge remote-tracking branch 'upstream/develop' into access
Merge remote-tracking branch 'origin/develop' into access
Merge branch 'develop' of https://github.com/openwebwork/pg into access

Conflicts:
	macros/PGessaymacros.pl
Merge pull request #149 from goehle/access

Accessibility

This has to be pulled since the webwork2 accessibility pull request was done.