Remove now unused variable

Applies to #296
Add the Greasemonkey API to highlighting and let ACE know it's a global object set

* This will remove a ton of the little yellow triangles. If ACE is ever updated we'll need to readd this to our local copy if they change it.
Merge pull request #308 from Martii/documentPageFixes

Remove now unused variable
Add unsafeWindow API to ACE

Applies to #307
Merge pull request #307 from Martii/modifyACEforGM_functions

Add the Greasemonkey API to highlighting and let ACE know it's a global ...