Win32 & builder fixed, DDS fixes, quality flag--

- ozEngine
  * fixed DDS loader for RGB(A), M$ recommendations for pitch used
  * LOD bias for loading mipmapped textures
- ozFactory
  * Builder
    + isImage()
    + FreeImage C API used (C++ is not built on Win32)
- build
  * builder didn't work since '@'-paths, fixed now
  * quality setting removed, highest is always used