Version 2.0-beta

pre-release version 2 of the client major changes:
1- update client version to: 317
2- update ttc version to: 9
3- use 4 byte packet length instead of 2 bytes
4- use advanced negotiation
5- define NCHARSET in the data type negotiation
6- use big clear chunks
7- use more verifier type in authentication object
8- receive session properties after authentication without calling getNLSData()