Adding nose to requirements
Adding guard code to augment tests

* Checking if nothing is being passed in the constructor and throwing
  error if that is the case
* get_feed_details was initializing object entiries to "", changed it to
  None to keep in accordance with yesterdays change for MySQL
Adding initial set of tests

* They can be VERY bad since this is the first time i am writing unit
  tests
Adding tests to travis
Merge pull request #21 from shrayas/tests

Adding some initial tests