Merge pull request #111 from doug-martin/master

v0.5.1
Merge pull request #112 from doug-martin/master

v0.5.2
Merge pull request #113 from doug-martin/master

v0.5.3
Merge pull request #114 from doug-martin/master

v0.5.4
Fixing grouped expressions for arrays of hashes with keys > 1
Merge pull request #115 from aheuermann/grouped_expression_fix

Fixing grouped expressions for arrays of hashes with keys > 1
v0.6.0

* Fixed issue where grouped expressions with arrays and hashes as items, the expressions generated from the hashes are anded and each array item is ORed properly #115