Add ability to set socket connection timeout on CIPDriver

[tlf30]

Hello @ottowayi,

I have run into a situation where I need to be able to modify the connection timeout on the CIPDriver socket (thanks to my interns again).

Please review the following changes and let me know what you think.

Example usage:

cip_driver = CIPDriver('192.168.1.25')
cip_driver.socket_timeout = 20
with cip_driver as driver:
   #Do something cool with driver

Thank you, Trevor Flynn