Added Bandit UCB1-tuned implementation

********* PEOPLE *************
Primary reviewer: @sc932 

Reviewers: @suntzu86 

********* DESCRIPTION **************
Branch Name: norases_366_ucb1_tuned_bandit
Ticket(s)/Issue(s): #366  

********* TESTING DONE *************
make test
make style-test
uhh... maybe call the base class UCBBase, UCBCore or UCBInterface or something like that? UCB1 and UCB are just way too close to each other. Edit distance of 1 lol