added netifaces module to get pub/priv ip on squid

fixed minor type error in index.html which only displayed minutes after
2, instead of 1.
Added description to ShoalMiddleware Class.
Added global config file and settings.
Restructured shoal directory to make using the configuration file easier
for the time being. Changed every file to use config settings.

Added config.py to get settings when prgram starts or use defaults.

Modified send.py to send its unique key every message incase the public_ip
was the same for multiple squids.