Added connection timeout to redis.
Improved redis connection error & info messages.
Added SHA256 support.
Added blake-256 support.
Moved diff1 to Algorithms.cs:diff1 as static.
Added new hash algorithms: blake, fugue, groestl, keccak, shavite3, skein.
IHashAlgorithm:Hash() now takes a config parameter so it can read from coin's specific configured options.
Fixed Crypto/Utils.cs methods, they'll no longer create Sha256Manager instance every time they get called.
Added x11, x13, x15 and x17 support!
Merge pull request #252 from raistlinthewiz/develop

more hashing algorithms support!, tiny redis fixes