(materials) built a basic `FixMaterial` from `WorldMaterial`

(materials.matl) fixed `ImportMATL`

(materials) fixed `_fix` materials overriding `_wld` materials

(props) apply prop scale

(wheels) use latest `ass`

(props) skip `mdl` which fail to parse

(wheels) use latest `ass`

(props) `rotation_euler` is in radians with wierd order

(wheels) use latest `ass`

(wheels) use latest `bsp_tool`

(props) trying to fix prop rotation

(materials) fixed `ImportMATL` operator

(materials.matl) fixed `load_dds`

(materials) fixed `all_materials` skipping placeholders

more bugfixes