store httpSignature in options so that a new client can be created using the options
updated parseLink regex
made http-signature a dependency
fixed a requires typo in trusted_server
added new ResourceErrors 428, 429 from rfc6585, fixed trusted_client when given a server_path
merged fix for mispelled references to hooked (spicydonuts)
added core handling for mixing in subclass contributed request options
solidfied the use of _state and baseUrl; some code cleanup
Merge branch 'master' into develop
merged develop, rolled version
improved connect integration
Merge branch 'master' of github.com:spicydonuts/webflow
Merge remote-tracking branch 'upstream/master'
renamed getSignatureKey to getSignature (it doesn't return a key) and removed some debugging code
converted key lookup to callback pattern