Add cancel based methods to event base interface
Add ItemsStack interface, without any Inventory
Fixed javadoc, added missing @Overrides

I accidentally deleted this

I'm tired, I screwed up a few things

I'm tired, I screwed up a few things
Fixed Javadoc describing Order.BEFORE_POST and Order.POST to be cancelable. Fixes #98
Merge pull request #97 from zeuslightning125/master

Fixed existing javadoc, added missing @Overrides
Added a system for creating chat messages with a style.
Supports colors, fancy stylings, and click/hover events.

Signed-off-by: Matthew Messinger <mattmess1221@gmail.com>