reoving outdated grader styling
New color styling for gradebook
adding new stylesheet
adding ability to set custom category icons
Update theme_essential.php
minor change to z-index of custom menu
Fixing custom icons on manage courses screen
Fix for indenting of categories
Fix the ability to set custom category icons.
Merge pull request #96 from leblangi/master

Fix the ability to set custom category icons.
Merge pull request #93 from felixod/patch-27

Update theme_essential.php
Fixing social network icon display
minor allignment fix
Custom CSS Fix
Fix minor icons layout and margins.
Add "Use max width for side regions" settings who allow to restrict the width of the side region when using a wide screen.
Fix categories icon who displayed text instead of icons.
Merge pull request #98 from leblangi/regionmaxwidth-master

Add "Use max width for side regions" settings who allow to restrict the ...
Merge pull request #101 from leblangi/minoriconslayout-master

Fix minor icons layout and margins.
Merge pull request #102 from leblangi/fixcategoriesicon-master

Fix categories icon who displayed text instead of icons.