Added numerous Mprops to make gm_lifevon(_alternativetest) more optimised

Added tunnel4 gallery which includes (for now) a small curve tunnel, and various straight lengths to accomodate different track lengths

Added additional models for gm_lifevon_alternativetest

Added more mprops for gm_lifevon

Added carriageway props in /roads/ - these are new props that for now are a complete set but may feature extra additions in the future if people are looking for specific versions. There are no ramped versions of these props at this time.

Added narrow_straight_transition3, 4 and 5
Added ramp_2560x400 and a plain version
Added portal3a to d, which are a thin and thick tunnel portal but also feature a simplified combine shield version (shield will need to be added manually)

Removed 'trains' files. These are outdated, now have been improved and added to their own addon, 'Black-Ice's Trains' located at:

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2811711861

Fixed set4's collision models

Fixed set4's collision models

Added set3 to /trains/
Added set4 to /trains/
Added light16a to H to /lighting/, a small light meant for walls and low ceilings with a few variations
Housing39 in buildings/nonacc/
Housing 40 in buildings/nonacc/
Warehouse22 in buildings/nonacc/
Platform_shelter2 in buildings/station/
Buffer3 to 6 in /trainstuff/
Depot1 in /trainstuff/

lyh_depot
lyh_tower
lifevon_piece1
lifevon_piece2
lifevon_piece3
lifevon_piece4
lifevon_piece5
shieldgenerator_ped

light13 with 4 variations
light14 with 4 variations
light15 with 4 variations
light16
skip1 with 3 variations

Adjusted mprop2's collision model
Added warehouse19_hollow in buildings/nonacc/
Added warehouse20 buildings/nonacc/
Added warehouse21 buildings/nonacc/
Added office12a, office12b, office12c buildings/nonacc/
Added table1 and table1b in infra/peds/
Added 13 map props for gm_lifevon