Merge pull request #86 from openwebwork/hotfix1

Hotfix1
Update math4.css

Addressed bug 2647
Fixed broken disabled buttons
Merge pull request #96 from goehle/upgraded2.7

Fixed broken disabled buttons
Merge branch 'develop' of https://github.com/openwebwork/webwork2 into develop
Merge pull request #141 from goehle/devupdates

Bugfixes and tweaks
Merge branch 'develop' of https://github.com/openwebwork/webwork2 into develop
Updating to openwebwork version
Fix errant mathview statement, fix typo in Save As button for file manager.
Merge pull request #143 from mgage/develop

fix two minor bugs in FileManager.pm
Fixed some issues with the timedatepicker functionality.  In particular time zones are no loger hard coded.
Removed inintended warn
Update default_achievements.axp

Fixed spelling
Modified datetimepicker so that it doesn't constrain what people can type.
Merge branch 'datetimefix' into devtimedatefix

Conflicts:
	lib/WeBWorK/ContentGenerator/Instructor/ProblemSetDetail.pm
	lib/WeBWorK/ContentGenerator/Instructor/ProblemSetList2.pm
	lib/WeBWorK/Utils/DatePickerScripts.pm
Update ContentGenerator.pm

Fixed minor bug
Added ability to turn date picker off in the course settings
Merge branch 'develop' of http://github.com/openwebwork/webwork2 into devtimedatefix
fixed unintended change
Merge branch 'release/2.8' of http://github.com/openwebwork/webwork2 into devupdates
Update default_achievements.axp