Remove spaces after C in demoCourse.list

should get rid of the error messages about 'C ' not being recognized.
Merge branch 'release/1.7' of https://github.com/openwebwork/webwork2 into release/2.7
Merge pull request #72 from goehle/upgraded2.7

Fixed missing message
Merge branch 'release/2.7' of https://github.com/openwebwork/webwork2 into release/2.7
Fix typo in Cosign.pm for Gavin
Merge pull request #73 from mgage/release/2.7

Fix typo in Cosign.pm
set default editor choices for release/2.7

classlist editor 2, homeworkset editor 2, and PGProblemEditors 2 and 3 (need both because editor 3 is iffy with older themes
Provide graceful fall back if theme is not available.

This is a bit of a hack since it hardwires math4 theme as the default theme that is always available.  A future iteration should make this defaultDefaultTheme configurable in defaults.config. (We should also clean up the variable names. :-) )
Merge pull request #74 from mgage/release/2.7

Add graceful failure if theme is not available.
Protect HTML::Scrubber from being fed an undefined variable.

This can be more elegantly done using the // construction but that
breaks perl 5.8   -- so we'll do it this way for now.
Merge branch 'release/2.7' of https://github.com/openwebwork/webwork2 into release/2.7
Merge pull request #75 from mgage/release/2.7

Fix bug in using HTML::Scrubber
Fix stupid $ typogit add GatewayQuiz.pm!
Merge pull request #76 from mgage/release/2.7

Fix stupid $ typo
Replace webwork2-dev with webwork2 in README
update pointer for release notes
Fixed uninitialized variable