Relax dependencies to work with ghc-7.6.3

Relaxed dependencies for base and bytestring packages, for ghc-7.6 compatibility. bytestring-0.10.0.2 and base-4.6.0.1 are bundled with ghc-7.6.3. A `tested-with` field has also been added.
Merge pull request #1 from robstewart57/patch-1

Relax dependencies to work with ghc-7.6.3