Remove Templorary Development Rail

DB:
Added Bridges.

SRC: Fixed stacking when no point ID is found.

DB:

Added: Slig's Railcar

SRC:
1) Timers are now properly destroyed thanks to unique key system
2) Timers are optional for SetSolid()
3) Solid NONE initialization is now non tied to a timer
4) Fixed non-stacking when Trace has more points than the Holds

DB:
1) Added Solid Initialization.

Better library mnemonics

Fixed trackassembly.lua:1624: attempt to compare number with nil

White texture ID is taken once from the file on the HDD ( 115 )

SRC:
1) Added piece Z offset HitWorld when unchecked Origin from mass-centre
2) Made custon Tool screen offering a stacking information
3) Added more methods to the AsseblyLib library
4) Logs are now controllable in single player

Fixed Counter-Fix Shinji Rails Z Offset from 8 to 7.346