Added Bandit BLA implmentation

********* PEOPLE *************
Primary reviewer: @sc932 

Reviewers: @suntzu86 

********* DESCRIPTION **************
Branch Name: norases_373_bla_bandit
Ticket(s)/Issue(s): #373 

********* TESTING DONE *************
make test
make style-test
I agree with @suntzu86 we should do the state saving approach to only make this test deterministic. I thought the RNG was global at class/file level (every import numpy), not at global global level.