FD-04 Change Follow to Like button

The Follow button only work to follow personal Facebook accounts, not Facebook pages
FO-03-04 Bugfix: User name cannot be reset on login anymore

User name was reset when it had been changed by the user, if the user then used his facebook or google account to sign in
Merge pull request #13 from Dzeta/FD-04_SocialNetworks-Sharing

FD-04 Change Follow to Like button
Merge pull request #14 from Dzeta/FO-03-04_SignInUp-Facebook-Google

FO-03-04 Bugfix: User name cannot be reset on login anymore