zfind using participle

[laktak]

Hi! I had a lot of fun building zfind using participle :)

I took the SQL example and modified it into a 'where' expression parser and evaluator. If this can help anyone as an example the code is here: https://github.com/laktak/zfind/tree/master/filter.

I made some changes to the syntax to make not work for between and in as well as like from the original.

[alecthomas]

Awesome, zfind looks cool :)