Merge pull request #6 from cartazio/master

fixed long standing decompression bug!!!
minor Applicative golfing
bump for hackage release
ghc 7.4 requires Data.ByteString.Char8 to be imported for the IsString instance
swapping in most current lz4 code from google code,  same as r90 of lz4 release of march 2nd.
Passes the quickcheck suite