Rolled back previous Salsa20 refactoring to make core function private again
Uncommented traces in entropy source and secure random tests
Implementation of HMAC

closes #39
Implementation of SHA-1

closes #7
KeyFactory interface and tests
Implementation of PBKDF2

closes #40
Implementation of script

closes #31
Renamed AutoReseed secure random to AutoSeed
Registry implementation of last added algorithms plus tests for them