1. added the UI styles using
http://jgilfelt.github.io/android-actionbarstylegenerator/

2. Added the Tweet Details view

3. - Added the ProfileActivity which uses ProfileFragment to show the
user's profile details like img, name, tagline, followers, followings. 
and tweets list to show the users tweets. 
  - It is important to pass the user to both the underlying fragments,
so the fragments need to be dynamically created.