New predicate support for where

[sachinpkale]

Add support for not between and similar to predicates.

Add support for important C3P0 configs.
Add convenient function for kylin DB.
Add cloverage plugin for test profile.

[AlexBaranosky]

My 2 cents:

Make Korma easier to configure with the c3p0 --- and leave the c3p0 configuration to the user... don't attempt to wrap every c3p0 configuration, that's a waste of time/energy.

The way I configure my c3p0 pool at work is to just pull the pool off like (:datasource @(:pool db))

Then just call the java api on it like:

(.setCheckoutTimeout pool CONN_TIMEOUT)

[AlexBaranosky]

This code imho should be two PRs -- it's two different changes smooshed into one branch.

[AlexBaranosky]

Imho again: connection pool management by Korma is/was a mistake :) If there was ever going to be a Korma 1.0 -- I'd vote for removal of conn management from the api entirely. (Amen there probably should be by now, hehe -- nothing in the Clojure community ever makes it to 1.0.0 :) )