Simplifying queries, removing need for arror operator
Adding recompose-query (to be renamed)
Merge branch 'master' into simplifying-queries, rename `recompose-query` to `q->`.

Conflicts:
	src/qbits/hayt.clj
	test/qbits/hayt/core_test.clj
Cleaning up API (multiple arty for query), adding merge-parts helper.
Merge pull request #1 from ifesdjeen/simplifying-queries

Simplifying queries, removing need for arror operator