Revert "Add missing less dependency"

This reverts commit fe605b6b16130299e0ebad38c085fd17c8392049.
Revert "Remove therubyracer dependency"

This reverts commit 33d87234be2267bd2dd0a209f43897e90569ba5c.
Revert "Upgrade to Rails 3.2.11"

This reverts commit 7991724adcb51342f6ffcf28a2149bdbfbb501db.
Upgrade Rails to 3.2.11