Added Test.Hspec.Util.stdGenToInteger and stdGenFromInteger
Whitespace change
Use  NonNegative instead ==> in specs
Add orphan Eq and Arbitrary instance for StdGen in specs
Minor spec change
Update README
Workaround for travis-ci/travis-build#91
Print error message on invalid argument to --qc-max-success
Add specs for --format
Add --seed
Rename safeEvaluate to safeTry
Reuse previous seed on --re-run
Print used seed on failure
Bump version
Print "Randomized with seed ..." only once
test/Test/Hspec/RunnerSpec.hs: remedy test suite failures

Promote test properties from "Int" to "Integer" to avoid variance in the
generated number sequence between 64 and 32 bit platforms.
Update contributors