Updated version tags

Merge pull request #182 from gigya/develop

Fixed license tag

Merge pull request #179 from gigya/develop

6.4.0

Merge pull request #176 from gigya/develop

6.3.0

Merge pull request #172 from gigya/develop

6.2.0

Merge pull request #166 from gigya/develop

6.1.1

Merge pull request #163 from gigya/develop

Version 6.1.0 – removing social features

Merge pull request #159 from gigya/develop

6.0.3

Merge pull request #154 from gigya/develop

Version 6.0.2

Merge pull request #150 from gigya/develop

Version 6.0.1