Escalation [Do not merge yet, Request For Comment]

This commit makes the lower and upper event frequency double after an hour passed.
Our server's base event frequency is between 7.5 and 20 minutes. This means after an hour, the wait times become 3.75 and 10 minutes.

I would like player opinions on this one:
*Should I make it a config option, and possibly admin toggle able midround
*How much time should pass for this to be in effect?
*Should we edit the starting event chances with regard to this
*Should it halve, or maybe just make it 2/3
*Should it change gradually