[SNAPSHOT]
 * add Salesforce API

[2.7.3]
 * FIX: ScribeJava shouldn't require all async http client provider to be on the classpath if using only one of them

[2.7.2]
 * FIX: ScribeJava shouldn't require any async http client provider to be on the classpath (neither ning neither AHC)

[2.7.1]
 * do not hide checked IOException in unchecked IllegalArgumentException

[2.7.0]
 * make http async client implementation be more pluggable
 * add async-http-client 2.0 support (thanks to Sai Chandrasekharan https://github.com/saichand)
 * add Misfit (http://misfit.com/) API
 * implement async version getting Request Token for OAuth 1.0a

[2.6.0]
 * simplify async/sync usages
 * add optional "User-Agent" config option to use while making http calls
 * refactor usage of grant_type [authorization_code|refresh_token|password|etc]
 * add Genius.com API authentication (OAuth2)
 * fix GitHub API
 * standardize authorization url generation for OAuth2
 * update Facebook to v2.6
 * cleanup: drop old APIs without Examples and with outdated domains

[2.5.3]
 * fix - do not send two Content-Type header in async requests
 * improve OK example

[2.5.2]
 * add Google Async Exmaple (with bugfix for it to work)
 * add OSGI manifest metadata
 * apiSecret is not mandatory parameter in config (to use on client sides and other flows without need of the API secret)
 * implement OAuth2 Authorization Response parsing in the OAuth20Service (to extract code and state from url, useful for Android)
 * update ok.ru API urls, add 'state' support, add refresh token to the example

[2.4.0]
 * APIs 2.0 can define different endpoints for access token and for refresh token (the same urls by default)
 * mark Facebook doesn't support refresh token by throwing UnsupportedOperationException
 * make JSON Access Token Extractor be the default for OAuth 2.0 (according to RFC 6749)
 * drop Google OAuth 1.0 support (OAuth 1.0 was officially deprecated by Google)
 * add response_type parameter to the ServiceBuilder/OAuthConfig to use not only "code" for authorization code
 * remove Verifier object, we just need Strings, 'code' for OAuth2 and 'oauthVerifier' for OAuth1
 * default HTTP verb for OAuth 2.0 Access Token EndPoint is POST (http://tools.ietf.org/html/rfc6749#section-3.2)
 * send missed headers in async version (as in sync)
 * support 'password' grant_type for OAuth 2.0

[2.3.0]
 * Stack Exchange authentication via OAuth 2.0 (stackoverflow.com, askubuntu.com, etc.).
 * Support response in gzip.
 * differentiate OAuth1 Access token, OAuth 1 Request Token and OAuth 2 Access token, make them conforms RFCs
 * OAuth 1 APIs can choose whether to pass empty oauth_token param in requests
 * Support refresh tokens for OAuth2 (very thanks to P. Daniel Tyreus https://github.com/pdtyreus)

[2.2.2]
 * make all APIs to be extentable (have protected constructors, useful for testing)

[2.2.1]
 * Update Facebook API v2.2 -> v2.5
 * Update hh.ru urls

[2.2.0]
 * Let GoogleApi20 supports OOB
 * Updated Imgur API to OAuth2
 * force not to instantiate stateless APIs. Use provided singletons
 * reduce OAuthService abstraction for OAuth1 and OAuth2. Separate OAuth(1|2)Services

[2.1.0]
 * add Pinterest API

[2.0.1]
 * small code enhancements

[2.0]
 * merge back SubScribe fork to the ScribeJava
 
for previous changes see
v1-changelog - changelog for 1.x version
v2pre-changelog - changelog for SubScribe fork