Restore NSURLConnection(BlocksKit).delegate; fixes #220
Always define a2_methodSignaturesCompatible
Replace libffi usage with pure NSInvocation
Remove libffi/ffi-mini
Ignore IntelliJ metadata
Return invocation results as NSValue
Simplified A2BlockInvocation initializer; rewrite tests
Document constant
Fix @encode(SEL) formatting
Fix whitespace
Copyright notice fixup
Update podspec for 2.2.2