.ubulk textures

[spiritovod]

@zarro: ubulk is just continuous raw data, there is nothing to parse there. All metadata about its contents is stored in respective uasset/uexp (depends on packaging method) and if you have only ubulk on hands, which is more than strange, the only thing you can do is to wrap raw data with something like RawTex or PVRTexTool. But it will not work for virtual textures anyway, as they should be reconstructed from blocks based on metadata from main object. Alternatively, you may use umodel for usual textures or fmodel for both texture types, if possible.