Removing QQ and Weibo providers, as these link to a fork of
oauth2-client and not directly to individual provider packages
Alphabetically sort provider names
Provide base methods for userUid, userEmail and userScreenName + Tests
adding link to external vkontakte package
Updating PHP Code Sniffer and fixing some CS violations
Merge pull request #181 from j4k/master

adding link to external vkontakte package
Code style improvements
Merge pull request #163 from bajb/master

Improvements to AbstractProvider
Merge branch 'master' into 1.0