Use OAuth2 token to access APIs.
Update docs to reflect new OAuth2 interaction
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Authentication is handled outside this gem now
Clean up specs and initializer. Add pending spec for refreshing token
process_response doesn't make assumptions about the state of the class
redefine success to use built in functionality in Net::HTTP
remove use of instance variables & separate methods for future refactoring
remove unused doc_handler format code
Merge pull request #4 from TildeWill/master

Add OAuth2 Support, remove ClientLogin support