[Issue #110] fixing macro expansion bug.
cleanup `do-query`
[Issue # 74] transactional wrapping for multiple databases
rename
Merge branch 'master' of github.com:korma/Korma into fix-make-query-then-exec-calls

Conflicts:
	src/korma/core.clj
Macrofy make-query-then-exec & where-or-having-form

This allows us to leave the call sites clean at the expense of having
slightly more complicated macros.