Update gamedata
Update smac plugins
Remove montane
Update bigrock nav mesh
Update gamedata
Dev/testing changes for hidden
Add custom arena maps
Add custom map for BYOB Friday
Update UGC files for S8
BYOB Friday changes

* update gitignore
* recompile basebans after last SM update
* update banned_user list
* update mapcycle
* bigrock nav updated
* metalworks added