BETA: Renaming `IL2Procedure` to `IProcedure`
	* Also adding generic return type.

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6371 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad
BETA: Introducing `HtmlUtil` class containing useful methods for constructing HTML.
	* Page functions
		* Patch by: !UnAfraid
	* Gauge functions.
		* Patch by: Nos

Reviewed by: Nos, !UnAfraid, Zoey76, St3et, xban1x

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6372 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad