game: implemented render stripe component logic

it's only stripe composition and texturing for now,
still need to:
* for now only quads are supported as stripe polygons,
  we should also support polygons with sides > 4 and
  m.b. also support triangles, but with triangles texture
  generation becomes much harder, m.b. we shouldn't do this...
* support culling
* support orientation in RUBE
* fix texture repeat - we need to drop current
  shader-based approach and just use separate
  textures when we want to repeat them