Fixup for base 4.5 not provinding default testBit, bit and popCount
removed unwanted import of Data.Bits
hlint: stop bitching about module export shortcut
hlint: better names for power of 2 constants
some minor rewriting and cleanup
raaz-modular is once again travis built
Added way to parse BE Words
RSA PKCS Signature scheme added
Added Diffie Hellman Key exchange
Added Raaz.DH