added htdocs/applets/*.swf to .gitignore these are symlinks added by OPL-update to swf files found in the problem library"
Merge remote-tracking branch 'openwebwork-dev/master'
Updated MathJax submodule to point to a v2.1 revision
Merge pull request #83 from aubreyja/master

Updated mathjax submodule to point to v2.1 and updated .gitignore to ignore new htdocs/applets/*.swf symlinks intoduced by recent update to OPL-update
Adding Korean localization file
Merge pull request #90 from aubreyja/master

Adding Korean localization file
Added comments to essay questions and some other tweaks.
Merge branch 'ww2.5.1.3' of https://github.com/mgage/webwork2-dev into ww2.5.1.3

Conflicts:
	lib/WeBWorK/ContentGenerator/Problem.pm
Merge branch 'master' of https://github.com/openwebwork/webwork2-dev
Polishing new essay answer stuff.
Better path toggle in library browser 1.
Merge branch 'ww2.5.1.3' of https://github.com/mgage/webwork2-dev into miketmp
Remove hard wired link to gage.
Added missing popover file
Added more missing files
Fixed zero != undefined bug.
Merge pull request #97 from goehle/ww2.5.1.3

Upgrade to essay questions
Merge branch 'ww2.5.1.3' of https://github.com/openwebwork/webwork2-dev into ww2.5.1.3

Includes new features from Geoff Goehle
Merge pull request #102 from goehle/ww2.5.1.3

Added missing popover file
Merge branch 'ww2.5.1.3' of https://github.com/openwebwork/webwork2-dev into ww2.5.1.3