gnowledge/gstudio — pull request #166 by sunnychaudhari (2014-02-04 18:27:16+00:00)
Title: Created Shelf & Author as GSystemType also RelationType has_shelf

Created :
```
Shelf & Author as GSystemType
has_shelf as RelationType
( To show relation between user and its own shelf )
```
Included :
Author class in models having two fields initially username and email