Merge pull request #186 from raistlinthewiz/develop

Misc fixes, license text update.
Fixing miner auth.
Implemented MinerManagerFactory.cs.
Implemented AuthenticationError.cs.
MinerManager is now created per pools.
Merge pull request #187 from raistlinthewiz/feature/auth-fix

Feature/auth fix
Implemented share errors.
Share.valid will be now automatically set based on if share contains an error.
Fixed PoolTests.cs.
Merge pull request #188 from raistlinthewiz/feature/auth-fix

Implemented share errors.