BETA: Reuse time stamps rework:
	* Using lazy initialization will prevent from useless object creation.
	* All related code is now in `L2Character`.
	* Removed custom skill type GET_PLAYER.
	* Cleanup at `L2PcInstance`, `L2PetInstance` and `TimeStamp`.
	* Effects must be restored '''before''' sending `SkillCoolTime`!
	* Added missing skill level in `SkillCoolTime`.
	* Added missing !JavaDocs.

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6366 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad