Added recoveringServer for long running processes
Added tests
Split test to allow paralel execution
Thread delay does not offer real time garantees...
Removed commented code
Added preliminary tests
Merge branch 'justTests' of http://github.com/jcristovao/retry into justTests

Conflicts:
	test/QuadraticDelayRetrySpec.hs
	test/RetrySpec.hs
Merge remote-tracking branch 'origin/units' into units