add parameter redirect url for taglib

- add tests for new functional
- example of use:
	<oauth:connect provider="facebook" id="facebook-connect-link" class="fb" redirectUrl="${redirectUrl}">
        	Facebook
	</oauth:connect>
fix user nickname
Merge branch 'redirectUrlParam'
add support Google Api OAuth 2

Google20Api provider can be taken from https://github.com/AlekseyLeshko/scribe-java
Merge branch 'googleOAuth2'
fix params in OauthTagLib
Merge pull request #24 from AlekseyLeshko/master

Redirect url parameter for taglib and support Google OAuth2