Add generic Makefile

Includes doc and format targets, variously useful.
Prelimiary support for hsc2hs in Makefile
Async monad
Add implicit rule to build .hsc source files
Merge branch 'master' of github.com:anchor/rados-haskell
Merge branch 'master' of github.com:anchor/rados-haskell

Conflicts:
	src/System/Rados.hs
	src/System/Rados/Internal.hs
Merge branch 'master' of github.com:anchor/rados-haskell
Beginnings of a test suite

Do a simple round-trip test of writing an object then querying its
content.
Add test suite to .cabal file
Add rados_remove() to bindings
Change test object name to match origin file