lib: adds reference to last turn in bucketed_game

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/mnit: cleanup code

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/opengles1: fix duplicated drawing of triangles

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/sdl: use (or not) SDL mouse motion events

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/math: fix Float::abs

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib: intro the HashMapWithDefault class

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>