documentation fix for EndianStore
some more doc fixes
improved the documentation of the Raaz.Write module
added a tryWrite function
added doc for page size
improved docs of R.Write.Unsafe
Added Digestible class
Initial Auth design
Added documentation for CryptoMode
Using type based cryptomode for ghc < 7.4
Using CryptoMode instead of Direction in Raaz.Primitives.Cipher
fixup R.P.Cipher
Using EncryptMode and DecryptMode instead of Encryption and Decryption
Fixed raaz-cipher tests
Fixed raaz-cipher benchmarks
Fixed CryptoMode
Added Encrypt instances for salsa and AES
Fixed warning in Salsa20.Instances
Got rid of HasInverse in raaz-primitives
Added CryptoSerialize