Add Beacon BlockState for hopper events. Fixes BUKKIT-3932
Add method to update state without physics update. Addresses BUKKIT-3939
Add Effect command. Adds BUKKIT-3763
Ignore all .DS_Store files, not just root folder
Pulling Bukkit into Bukkit-Javadoc
Fix paragraph tags in JavaDoc

The HTML 4.01 specification states that paragraph tags are not null elements
and thus make little semantic sense to eclose nothing.

This commit changes all the self closing paragraph tags into open paragraph
tags. Closing tags are ommited as allowed by the HTML 4.01 speciication. This
change brings our JavaDoc into compliance with the HTML 4.01 specification.