Enable settings specific to materials
Import textures

Still need to create materials for them though.
Tweak material import error messages
Fix importing textures from/to paths with whitespace
Add saving of settings
Add browse button for asset path
Import materials

Only handles $basetexture at the moment.
Don't combine the submeshes of solids

They need to be separate so that they can be assigned different
materials.
Fix to stop importing materials that are already imported
Move default material to Assets/Materials/Dev
Assign materials to imported brushes
Fix old events not being removed after firing
Add default material to objects without a material
Use the proper texture size to calculate UVs
Fix texture coordinates

Texture coordinates were calculated with the local position of each
vertex while they needed to be calculated with their world position.
Add error checking to 'uaxis' and 'vaxis' parsing
Add support for transparent materials
Fix material import when it shares a texture
Clean up ImportMaterialsTask

Split the massive "Run" method into smaller methods.
Add normal map importing