Merge pull request #7 from lowi0008/master

(feat) add initial file structure for ab_test controller and queries, (f...
Merge pull request #8 from lowi0008/master

ab_test controller, bookshelf config
Merge pull request #9 from lowi0008/master

(feat) work on ab.serveImages and helper functions
Add memcache module
(feat) create and export a memCache object
Merge pull request #11 from armandopmj/feat/memCache

(feat) create memcache class and export a memCache object
(feat) work on serveImage function, (fix) correct name collision in MemCache and implement pascal case for class name