Adding flask, route, postDAO, test_post

* Adding flask app
* Adding dummy route for index & a static html file for index
* Adding create post method for postDAO
* Adding test_post to test post addition to table
Adding Update & Delete methds for posts & groups

* Adding Update & delete method for posts table
* Adding Delete methos for groups table
Adding SQL schema

Can be used while bootstrapping the app & used for Travis
Modifying virtualenv folder for ignore
Changing requirements for the app
Getting Flask-Session running

* Now login works
* communication to UserDAO, get, validate works
* DB PASSWORD FIELD CHANGED TO VARCHAR(40)