Merged dev changes 10/24/2019

- Applied the nexttoken security fix (suggested by ficool2, important for MP port, no #ifdef MAPBASE because of volume of changes and irrelevance to readers)
- Fixed a crash with the follower wait point start/stop using handlers
- Fixed game_ui activator crash
- Changed vphysics triggers to accept more entities
- Fixed player squadmates not obeying hint node facing (e.g. wait points)
- Fixed npc_snipers
- prop_vehicle_jeep_old no longer changes classname
- Restored and added the other CTakeDamageInfo fields for point_damageinfo
- Fixed game_metadata not saving correctly
- Fixed logic_measure_movement not functioning while possessing spawnflags
- Added scripts/mapbase_rpc.txt script with choosable app ID and game image
- Fixed some casing that broke Linux support
- Added proper WorldVertexTransition blending to translucency and selfillum (translucency may need the translucent texture to be $basetexture, not $basetexture2)
- Added modified parallax corrected cubemaps to shader code (although currently unusable)
- Fixed Variant_ParseInput
- Added/restored custom scanner speed (experimental, needs more work)
- Several miscellaneous code changes/fixes and comment adjustments

README

@@ -7,6 +7,7 @@ The original code for phong reflections on LightmappedGeneric-derived shaders ar
 The Alien Swarm-based radial fog and rope code as well as the multiple skybox support are from Half-Life 2: Downfall. (https://github.com/DownFall-Team/DownFall)
 The dynamic RTT shadow angles code is from Saul Rennison on the VDC. (https://developer.valvesoftware.com/wiki/Dynamic_RTT_shadow_angles_in_Source_2007)
 The vortigaunt LOS fix is from Half-Life 2: Community Edition (dky.tehkingd.u in particular). (https://gitlab.com/RaraCerberus/HL2CE)
+The parallax corrected cubemap code (which is partly in Mapbase's code, but not yet usable) was originally created by Brian Charles. (https://developer.valvesoftware.com/wiki/Parallax_Corrected_Cubemaps)
 Various other code and contributions were based off of pull requests in the Source 2013 SDK (https://github.com/ValveSoftware/source-sdk-2013/pulls) and snippets on the Valve Developer Community (http://developer.valvesoftware.com/).
 
 All of the work mentioned above was open source when it was borrowed.