Several fixes to authenticator, added more unit tests

Some fixes include, in more detail:
- Using little over big endianess in some parts
- Flagging all the constructor numbers as unsigned
- Fixed bugs with factorizer
- Implemented TLSharp's RSA

main.py

@@ -1,10 +1,15 @@
 import parser.tl_generator
 
+from network.tcp_transport import TcpTransport
+from network.authenticator import do_authentication
+
 if __name__ == '__main__':
     if not parser.tl_generator.tlobjects_exist():
         print('First run. Generating TLObjects...')
         parser.tl_generator.generate_tlobjects('scheme.tl')
         print('Done.')
 
-    pass
-
+    transport = TcpTransport('149.154.167.91', 443)
+    auth_key, time_offset = do_authentication(transport)
+    print(auth_key)
+    print(time_offset)