add union support
cleanup
Merge remote-tracking branch 'origin/master' into add-union

Conflicts:
	sql-bricks.js
	tests.js
add union statement
Merge remote-tracking branch 'origin/master' into add-union
change unioning so that it does it jit
add union chaining
Merge remote-tracking branch 'origin/master' into add-union

Conflicts:
	tests/tests.js
add failing test for refactor
union() refactor
Added INTERSECT, MINUS, EXCEPT
Merge branch 'master' into add-union

Conflicts:
	readme.md
	sql-bricks.js
	tests/tests.js
Merge pull request #1 from CSNW/add-union

Add union