Check malloc for success before using result
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Merge branch 'next'
Welcome to BlocksKit 2.2!
Remove duplicate references

The BlocksKit.h file was added twice to the Xcode Copy Headers build phase.

This change should fix the Xcode warning caused by it: he Copy Headers build phase contains duplicate references for one or more files"
Merge pull request #219 from vially/patch-1

Remove duplicate references
Update README.md
Restore NSURLConnection(BlocksKit).delegate; fixes #220
Always define a2_methodSignaturesCompatible
Replace libffi usage with pure NSInvocation
Remove libffi/ffi-mini
Ignore IntelliJ metadata