Add feature to filter own posts.

[sahilrider]

It would be nice to filter own posts or to sort the posts as per some criteria.

[vinitraj10]

Sure!! will do that

[mentix02]

Wrote a custom APIView in Backend/post/views.py called AuthorPostView that returns all the posts made by a user by querying author__username and linked it to url with regex - r'^author/(?P<username>[-\w]+)/$'.

Frontend to be completed. Pull requested - #24