Major update !

DB:
1) Added All pointed bridges
2) Added table "PhysProperties"
3) Added all propertyes from https://developer.valvesoftware.com/wiki/Material_surface_properties

SRC:
1) Added material surface type selection with two Combo boxes
2) Added Enable gravity checkbox
3) Default piece name is now "Some Track Piece"
4) Iproved mnemonics

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