TabDigital/squel — pull request #8 by waterytowers (2014-10-02 01:59:46+00:00)
Title: Feature/to param nested

Add features:
> UNION block with toParam support
> toParam on TableBlock and Expression and Join ON Condition
> Expression can contain parameterised subquery
> Join ON Condition can contain an Expression and still support subqueries and toParam

New tests to support features.