Merge pull request #142 from lmle/feat/client/ab_test

(feat) ab_test: Send millisecondsPickWinner and millisecondsStartTime to...
(inc) completes basic refactor on user query
Merge pull request #143 from nrobeR/refactor/bookshelf

(inc) completes basic refactor on user query
(test) ab_test: Add tests for services