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
You want to write
```
#: My decription
VARIABLE=value
```

sphinx won't autodoc this unless it has the colon.  If you need multiple lines of description, then:
```
#: line 1
#: line 2
#: ...
VARIABLE=value
```
Could you change this in your constants file (and any other bandit-related places) for constants that you'd like autodoc'ed?