Implemented throttling chat messages.
Updated readme.
Added Github Ping and Push event support.
The chat throttle amount can now be set via the properties file.
Added allowing burst messages without throttling kicking in and a minimum delay, configurable via the properties file.
Polished push event message formatting.
Clarified how to create a post web hook in the readme.
Merge pull request #1 from skiwi2/master

Skiwi's update