Alternative query language for bluge

[Michael Schuett]

I had already done the work for a new query language using bleve however I have now ported it to bluge for others to use and with all the original tests still passing!.  You can read more about it at https://github.com/pinkluz/lql. Some breaking changes will likely come as I understand bluge better and based on the outcome of https://github.com/blugelabs/bluge/issues/37.