Made a few changes to make the AddUsers table a little prettier in math4.
Fixed an issue where renaming a course caused the past answers to not be found in the database.
Removed extraneous code.
Fixed bug with achievement items not generating the correct array of set problem counts.
Hotfixing patch for 2989
Merge pull request #284 from goehle/addtable

Formatting Bug
Merge pull request #298 from goehle/hotfix

Hotfixing patch for 2989
Merge branch 'master' of http://github.com/openwebwork/webwork2 into renamefix

Conflicts:
	lib/WeBWorK/DB.pm
Merge pull request #302 from mgage/master

Fix bread crumbs to allow for empty nodes.

Tested and works on pg editor 2
Merge pull request #283 from goehle/renamefix

Rename Bug
Changed the grading link for essay problems.  It no longer keeps track of whether or not there is an ungraded essay problem, but it also runs a lot faster for big courses.
Merge pull request #330 from goehle/essayslow

Essay Optimization Hotfix
Merge pull request #15 from openwebwork/master

update local master branch