Disable /announce logging monitor so production env works

This bug in faye-rails is preventing us from starting in production mode:
https://github.com/jamesotron/faye-rails/issues/27
Ignore precompiled assets
Remove blank URL config file

Use our IP
Run in production
Remove non-full heats when recalculating heats

This is important, or the first three heats only have 1 person after the first contestant is entered.
Correctly calculate heat/run count for generating the lineup