Minor optimizations

Fixed missing model spam with Lightsaber SWEPs

* Added rb655_lightsaber_disallow_custom_content - default 1 - Disallows using random models as lightsaber model in multiplayer
* Entity can now deal damage/effects from the tip of the blade towards base of the blade like SWEP
* Consistent hit sound volume between the SWEP and the ENT

* Added a hint when you first equip the Lightsaber telling players how they can customize their Lightsaber

* Added Kylo Ren swing/hum sounds
* Fixed insane kill sound spam with certain entities
* Fixed func_breakable_surf not being killable by the saber
* Adjusted blade rendering
* Adjusted the sound mix

* Fixed entity producing disable sounds when deleted even if it was not enabled
* Fixed Lua errors when spawning the weapon using middle mouse click
* Spawning the weapon or entity through the spawnmenu now again automatically ignites the lightsaber
* Changes to make the addon more easily moddable
* Added ability to override the looping hit sound for modders
* The mod will now automatically patch addons that break the 3rd person camera

* Blade Length animations are now length and FPS independent
* Blade length and width are now unclamped in singleplayer ( still clamped in multiplayer, including duplicator )
* Lightsaber Entity's render bounds now update to proper size.

* Fixes potential Lua errors

* Updated error message text

* Added new hooks for servers to customize the HUD without editing the addon
* Added new feature to Force Power HUD that allows texture icons to be displayed instead of letter icons
* Added ability to increase the maximum amount of Force Power one player can have. Default is still 100.

See the documentation document in the description for more info