inital
Add some methods for reading int/long by variable length
complated Task:Protocol::ColumnParser
xreader extends inputstream implements mysql basic type reader
fix some columns metadata parser fault
xixi
Add Decimal
Merge remote-tracking branch 'origin/master1' into master1
completed mysql_type_bit, mysql_type_newdecimal
1.Completed Initial_Handshake_Packet
2.Add SocketReader and SocketWriter for MySQL-Connection
3.Changed original desgin of Packet

4.Update structure of directory
1.Completed Initial_Handshake_Packet
2.Add SocketReader and SocketWriter for MySQL-Connection
3.Changed original desgin of Packet

4.Update structure of directory
1.Completed Init Handshake Packet.
2.Completed GenericPacket.
3.Usual CommandPhrase Packet.
Fix bug
Fix bug