Added modular-exponentiation (montgomery ladder) with tests & benchmarks
Blake256 hash added
Blake256 padding function added
Blake256 added to cabal
Blake256 tests added
Merge reference implementation of BLAKE256 added.
Merge Montgomery ladded for slow exponentiation.
got rid of exception raising function runWrite.
ran stylish haskell on Raaz.Core.Write
better documentation for the Rounding class
added x-length branch to travis builds