Release 0.2.21
* Added server support for OpenRedis
* Added server support for Redis Green
* Added server support for Redis To Go
* Added synchronized time check to CLI
* Added Windows compatible help option
* Added signature to all server responses
* Fixed possible bug in URL request
* Changed documentation
* Changed unit tests names
* Changed fingerprint to SHA1
* Changed private key export format to PKCS#8
* Removed unnecessary code for fingerprint
* Removed unnecessary code for url quoting
* Removed time sync unit test
* Renamed class User to KeyStore
* Refactored user file removal
* Refactored api and url calls
* Splitted .gitignore files