Slight changes to the file upload pages

fixed up the header value, also the upload script will return the user
back to the assignment page they were submitting files for.
Small changes to layout of Admin welcome page

Fixed alignments, changed image formats, updated look and feel of
signup forms.
Header touchup

Fixed header welcome to display name and surname
Added assign critiques and fixed date submission

Admin can now assign critiques to all students in a course for an
assignment. Date checking in create and edit assessments was failing,
not sure why so re-did it.
removing extra calls to less.js

This is what was slowing down page loads (got rid of some last commit)
probably added by me, who knows.
Form Prettification

Admin create.php new look
Critiques Visuals

Fresh coat
Updated admin home page

removed buttons, added anchors instead
Revert "Updated admin home page"

This reverts commit 1c6c1ac660c952522d9de110dc73b5412b07b4ab.
Fixed home and _edit pages

renamed variables due to conflict.
New icons for admin tools

Redesign cass2.png, added crit1.png
Merged with master