Made response parsing more readable
moved to response parser to separate file
renamed to OAuth1ResponseParser
Improved error message handling
Made parsed body public
Now using the request parser for request token and access token
Improved error message
Merge branch 'master' into oauth1_refactor
OAuth 1 refactor fix+simplify, OAuth 2 refactor, support for "format" and "headers"

Signed-off-by: Arnaud Richard <a.richard@webshell.io>
Merge branch 'oauth1_refactor'