added cancellable EggCaptureEvent
Added metrics
Merge pull request #1 from andrepl/event

added cancellable EggCaptureEvent
Updated version number to 1.23
Shading metrics dependency
GriefPrevention support
Updated to version number to v1.24
Added health percentage check
Changed Travis JDK version.
Fixed travis build problem.
Added update check.
Mob health check now respects LooseEggOnFail
Fixed a bug where it was possible to spawn infinite amounts of chickens
if the catch failed.
Various code clean up
Removed redundant enable/disable messages
Added a configuration option to enable/disable update checking
Updated to 1.5 dev snapshot. Updated version to v1.26