memory-0.15.0: memory and related abstraction stuff

Chunk of memory, polymorphic byte array management and manipulation

• A polymorphic byte array abstraction and function similar to strict ByteString.
• Different type of byte array abstraction.
• Raw memory IO operations (memory set, memory copy, ..)
• Aliasing with endianness support.
• Encoding : Base16, Base32, Base64.
• Hashing : FNV, SipHash