Fixed some screen manager issues, smart textures now support bezier curves (changed how the physics body is generated), fixed some PhysicsEntity things, adjusted the default character properties, allowed accessing Entity startup parameters through _params,

Signed-off-by: Sam Hellawell <sshellawell@gmail.com>
Started work on fluid bodies, removed and added some default events, lightmap optimizations, added a termporary physics shape debugger

Signed-off-by: Sam Hellawell <sshellawell@gmail.com>