Added Component/System "OnClickedDo" and added the ability to whipe entity and system lists. Fixed gravity bugs.
Removed collision logic from gravity

Fixed collisions for realsies

Signed-off-by: Gavin Gassmann <gigimoigames@gmail.com>
Moved movex and movey into thier own methods.

Signed-off-by: Gavin Gassmann <gigimoigames@gmail.com>