++MTL and ++RAC
Don't automatically build unit tests
Merge branch 'master' into xcode6
++MTL, ++RAC
Fix RAC reference, :fire: Specta and Expecta
Just generally fix a bunch of things in the project
Update to jspahrsummers/objc-build-scripts@a54782
Fix compilation of Squirrel source files
Bump deployment target of tests
Manually import/link everything ShipIt depends on

These have to be statically built into the ShipIt, since (by contrast)
dynamic frameworks could disappear out from under it during the update
process.
Add Quick and Nimble to test target
Import Nimble and Quick errrrrywhere
The Test config trolls again
Find libextobjc files in RAC for testing
WIP migrate to Quick and Nimble spec formats
Restore some imports I erroneously removed
Refactor SQRLTestCase into a QuickSpec category
Finish upgrading to Nimble matcher syntax
Fix missing symbols, bundle ID failures, etc.
Increase timeouts for test app termination