move the rendering to renderer class #51
allow window resizing #51 #42
setup postprocessing #51
let manipulator inherit from AbstractCoordinateProvider to get world position from cursor position #51 #42
provide postprocessing step for water particle rendering #51

use textures for scene and particle depth buffers, allowing to work with these depth values
draw water particles with fixed world size #51
read manipulator view depth from scene framebuffer #51

improve renderer debug output
remove debug code #51
Merge remote-tracking branch 'origin/nirvana_40' into nirvana_rendering_postprocessing_51
fix game shutdown #51
Merge pull request #52 from lanice/nirvana_rendering_postprocessing_51

Nirvana rendering postprocessing