OAuth 2 support
Support for OAuth 2
Fixed code style issues.
Remove Single-Quatation from AUTHORIZATION_URL
Merge pull request #276 from potchama/master

YammerAPI
do not include the token in the signature if it's empty
Update src/main/java/org/scribe/builder/api/ConstantContactApi2.java

It didn't work for getting the token... 2 reasons, 
1: missing grant_type in the requeest
2: token extractor wasn't expecting a JSON response 
Update src/main/java/org/scribe/builder/api/ConstantContactApi2.java

fixed indentation (4 spaces, no wrap)
RSA-SHA1 / PKCS#1 signature service helper
Override equals/hashcode in Token
fixed code styling
Fixed indentation
Merge pull request #290 from eranation/master

Oauth2 client for ConstantContact - fixed
bounced version number and added changes to changelog
LinkedIn authorize URL changed
Add support for Ubutun One
Add support for HEAD, OPTIONS, TRACE and PATCH
Merge pull request #299 from joelittlejohn/more-verbs

Add support for HEAD, OPTIONS, TRACE and PATCH
Added Mendeley API class
Removed copyright notice