- update : introduce a new simple vertex structure, which contains only position and color.
- update : use homogenious coordinate representation for position attribute of vertices.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
- refactoring : use simpler colored vertex in render test.
- bugfix      : use he correct attribute names in base-shader for d3d11.
- bugfix      : fix setup of d3d-input-layout input structure.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>