Merge pull request #86 from openwebwork/hotfix1

Hotfix1
Update math4.css

Addressed bug 2647
Fixed broken disabled buttons
Update version to release/2.8
Update VERSION
Correct spacing
Merge pull request #96 from goehle/upgraded2.7

Fixed broken disabled buttons
Merge branch 'release/2.8' of https://github.com/openwebwork/webwork2 into release/2.8
Add help link for "levels" in the advanced search page in library browser 1
Fix bug when creating sets.
Make solution knowls work in library browser 1
Change Path ... to Show path/Hide path.
Merge pull request #108 from mgage/release/2.8_jj

Release/2.8 jj Fixes bugs in library browser 1.
Make mathview appear in math4
Merge branch 'develop' of https://github.com/GravelInnovation/webwork2 into mathview
Merge branch 'develop' of http://github.com/openwebwork/webwork2 into mathview
Merge branch 'devupdates' of https://github.com/goehle/webwork2 into mathview
Fixed bug 2653
Merge pull request #118 from mgage/release/2.8

Fixed bug 2653 (hidden sets became invisible in homeworkset editor 1
Fixed a problem with Messages in the answer output