Merge pull request Mantle#685 from k06a/fix/free-nsurl-transform-to-w…

…ork-always

Made automatic NSURL transfom to work even if JSONTransformerForKey method defined

Merge pull request Mantle#679 from knox/feature/faster-method-calls-1.x

Backported "faster method calls" to 1.x

Merge pull request Mantle#679 from knox/feature/faster-method-calls-1.x

Backported "faster method calls" to 1.x

Merge pull request Mantle#623 from RonanLB/maintenance_1.5.x

fixes libextobjc header collision when using libextobjc

Merge pull request Mantle#611 from ksuther/xcode7-upgrade-check

Xcode 7 really wants to run these upgrade checks.

Merge pull request Mantle#582 from jmah/jmah/581-recursive-models

Lazily create MTLJSONAdapter instance to allow recursive definitions

Merge pull request Mantle#568 from jmah/jmah/protocol-storage

Check superclass for property persistence

Merge pull request Mantle#525 from Mantle/fix-memory-crash

Fix __unsafe_unretained crashes in IMP returns

Merge pull request Mantle#520 from adamkaplan/faster-method-calls

Replaced use of NSInvocation with direct IMP calls for performance.