Rename the plugin to reflect organizational changes.

This PR reflects the organizational changes to the com.bitlimit.Tweaks package. 

Changes to take a look at include the head dropping, I'm unsure as to if this still functions as intended. I assume it would but please review.

Oh we also are now using 1.6.2 R1.0 for bukkit dependency as well as version bumped to 1.5.0 for this change.