Properly handle dates within queries, fixes #27
Merge pull request #28 from kriszyp/master

Properly handle dates within queries
Merge branch 'master' of https://github.com/persvr/rql.git
Fix union to properly union instead of adding duplicates
Merge pull request #33 from kriszyp/master

Fix union to properly union instead of adding duplicates
Merge branch 'master' of https://github.com/persvr/rql.git
reverted evaluator eval back to master,
fixed operator to string for minifying