Reorder imports in the project.

[RajuKoushik]

trafficstars

The imports have to be re-ordered in compliance with the pep-8 coding guide lines.

[singh1114]

It should look like this-

• [ ] future imports for absolute imports, unicode literals and print functions first. ---blank line---
• [ ] standard library imports. --- blank line---
• [ ] third party libraries ---blank line ---
• [ ] your own imports eg-views, models ---blank line --- ---blank line --- imports should be sorted according to the names.

[srbcheema1]

sir please review #109