Rewrote F3 MP End Component

https://github.com/ferstaberinde/F3/issues/157

- no more extra triggers created
- no longer run in init.sqf
- moved to new folder: f\mpEnd
- to end mission: [n] call f_fnc_mpEnd (on Server)
- new: mpEndReceiver does *not* need to be adjusted if any ending > 6 needs to be fired. It'll accept any number send. If the number has a corresponding ending in cfgEndings it'll use that, otherwise it'll use a generic ending screen.
- new: mpEndReceiver needs ONLY to be modified, if the user wants to run custom code before the ending
- new: mpEnd accepts a second (optional) parameter, state (boolean). If false it will display the "mission failure" type of ending screen, if true the "mission completed" type. Default is true.