Added sound notification and x-platform color support, updated README + config

Added sound notifications to mtgox_mon. mtgox_mon uses PyGame to play certain
sounds when certain trading events occur.

Also added cross-platform color support. Normally, printing ANSI color escapes
usually results in garbase printed to the console on Windows. However, the
included colorama module solves that, converting ANSI color escapes to native
Windows API calls for terminal colors. This enables us to have color support
on all platforms!

With these changed, updated the configuration file and parsing to handle the
new and old features. (Screenshots, sound making, color printing)

Finally, update the README.md to include these changes and articulate more
minor details.