++xcconfigs
Don't automatically build unit tests
Merge branch 'master' into xcode6
++xcconfigs
Remove Specta and Expecta
Add github/Quick as a submodule
Rename Mac target/scheme for clarity
Recreate iOS as a framework, fix build settings
Fix Mac build
Update to jspahrsummers/objc-build-scripts@a54782c
Add some linker flags to the iOS build
Ignore incomplete umbrella warnings

Unfortunately, this affects all importers of ObjectiveGit, because
otherwise Clang will complain about libgit2 headers not being imported
directly.
Link Quick and Nimble into test targets
Refactor GTTestCase into category on QuickSpec
Upgrade GTObjectTest as GTObjectSpec
Migrate specs to use Quick
Find and replace Expecta with Nimble
Migrate specs to Nimble matchers
Remove dead Specta and Expecta references
Add dummy SwiftSpec file