Added basic follow method. 

The basic follow method takes two usernames (The user, and the intended follower) and adds the relation to the db. This works so i pushed it. I am currently working on (The commented out code) a way to get the sql to check if the relation is in the db before inserting duplicate data. After getting that down I could set it up so that it takes an array of followers and a single user to check to see if the relation is there.