Initial check in of sample config file
Config File Support

Added config file parsing via ConfigParser. We now have general options
and protocol specific options. Perhaps this should be extended to have
host specific options… This would add extra complexity and for ssh this
would duplicate ssh's .ssh/config function. However, it could be handy
for rdp or database connections.
Dropped os_code dictionaries. This is now replaced by ConfigParser.
Build RDP login from domain + username. Also get screen size from
config file.