~ Add test case, fix cabal.
~ Fix GHC 7.6.3 warnings.
~ Allow passing raw dictionaries.

We need this in Kademlia DHT -- there are method which return
dictionaries with different keys depending on DHT server state.
~ Code style.
~ Prettify extensions lists.
+ Document raw dictionaries passing.
+ .ghci
~ Fix documentation markup.
~ Bump version.