Bump to 2.1.5
Bump to 2.1.5

mbroadst/rethinkdbdash,mbroadst/rethunk,tswayne/rethinkdbdash,kulbirsaini/rethinkdbdash,adammcarth/rethinkdbdash,beni55/rethinkdbdash,neumino/rethinkdbdash,abhishekgahlot/rethinkdbdash