add scenes, but they don't draw yet

in preparation of more scenes, bring back AscScene struct

fix scene node flags defined in incorrect header

add memory pool to gl context

apply new logging macros

improve error.c functions

fix probably incorrect array access of struct members

use refcounted objects for textures instead of pass-by-value int structs

add support for 2d textures in sprite shader - fixes #386

skip sprite rendering when there are no sprites in the scene

(0) -10 tip

mercurial