Create GroupHandler and GroupChecker classes to allow for Group checking esp. for modules
Revert "Create GroupHandler and GroupChecker classes to allow for Group checking esp. for modules"

This reverts commit 223461a835b68790d6d4b0cbb767855d8bec8e26.

Inconsistent with other handlers, GPL notice duplication, Bad method naming.
YAMLDataSource configuration path no longer requires trailing slash.
registerCommands method added to ServerBridge
Implemented basic skill loading
Oops, added missing break in skill loading case for "damage"
Added description to YAML skill loading
yamlHelper.getStringList is now tolerant of single strings in place of a list.
Added test for skill loading.