Created a bunch of new Events for when things like claiming and completing and holding requests can be hooked into.

People will have to update their import to point to the event package if they hooked into ReportCreateEvent in the past, sadly, though. Sorry.

Hopefully this can help people do more with interacting with ReportRTS - I was going to use it to send notifications to IRC and store data about which mods are doing which requests and stuff, and generate some statistics.