document the Hash class
added the HMAC primitive
removed some unwanted imports from R.P.Hash
added length safe version of replicate function
some code and documentation cleanup
added memory buffer to hash cryptographic hashes
added gadget instance for HMAC
HMAC gadget instances implemented.
SHA1: Template haskell removed, fixes #72
SHA256: Template haskell removed, fixes #72
SHA512: Template haskell removed, fixes #72
raaz-hash.cabal: Template haskell removed, fixes #72
Raaz.Types: Template haskell removed, fixes #72
Raaz.Util.TH: Template haskell removed, fixes #72
Raaz.Hash.Sha224.Type: fixed warning due to import
Added powModuloSlowSafe (Montgomery ladder) with tests & benchmarks
Made changes to benchmarks of modular expo functions