Log Message:
Update to 1.3120

Upstream changes:
1.3120 24.12.2013

    [ ENHANCEMENTS ]
    * GH #974: Make plugins play nicely with mro 'c3'. (Fabrice Gabolde)

    [ DOCUMENTATION ]
    * GH #972: Correction of a truckload of typos. (David Steinbrunner)
    * GH #971: Stress that the request's 'env()' method is prefered over
        accessing '%ENV' directly. (isync)
    * GH #968: Fix 'ScriptAlias' example in Deployment docs. (reported
        by tednolan)
    * GH #976: Document and trap limitation in Dancer::Test. (Tom Hukins)
    * GH #976: Improve references to related modules. (Tom Hukins)