Added support for multi-column "where in" clauses. ex:"(col1,col2) in ((1,1),(1,2),(2,1),(2,2))
Added tests for multi-column "whereIn"
update bluebird dependency
changed mocha default timeout to 3000 and removed "//CHANGED" comments
Merge pull request #219 from ruifortes/master

Added support for multi-column "where in" clauses. ex:"(col1,col2) in ((1,1),(1,2),(2,1),(2,2))
additional tests & data for #219
Add more things that could be considered operators, fix #226
docs prep for release
release 0.5.12