added operators deep, not
Merge branch 'master' of https://github.com/persvr/rql.git into dev
Merge branch 'master' of https://wshager@github.com/wshager/rql into dev
Merge branch 'master' of https://wshager@github.com/wshager/rql into dev
added search and contains
Merge branch 'master' of https://wshager@github.com/wshager/rql into dev