Version 2.2.0

• Add comp_prop_rope/comp_prop_cable: These allow generating 3D static prop versions of cables, like in Source 2. Place them down, choose a material, then connect them together like regular move_rope/keyframe_rope.
• The postcompiler is now able to properly handle pre-L4D entity outputs.
• Added "plugin" support to the compiler - directories can be specified which contain scripts to be run on the map in addition to the existing ones.
• Vactubes now have a "next junction" option for manually specifying the next location, and have a 45 degree curve variant.
• Add a pile of new entity sprites by @lazyRares.
• Propcombine can now use a bundled copy of Crowbar to decompile models if the sources are not available.