rewrite some text about the hmac verify method
Merge pull request #439 from reaperhulk/hmac-verify-text

HMAC verify text update
Add myself to __authors__
Merge pull request #440 from public/vanity

Add Alex Stapleton to __authors__
Merge pull request #425 from reaperhulk/travis-me-too

Travis OS X Support
Add initial CommonCrypto bindings (no backend yet)
cover a missing branch in the commoncrypto bindings
add is_available() to CommonCrypto binding, use it for skipif
add CommonCrypto binding docs
refactor commoncrypto's is_available to check platform for now