Initial commit of Box2D FFL callable implementation. Add -DUSE_BOX2D to include in compilation and link to box2d library as appropriate for your platform.

Signed-off-by: Kristina Simpson <sweet.kristas@gmail.com>
Merge branch 'master' of github.com:frogatto/frogatto
Merge branch 'master' of github.com:frogatto/frogatto
Merge branch 'master' of github.com:frogatto/frogatto
Added a configurable mouse over "appear" delay for tooltips.
Merge branch 'master' of github.com:frogatto/frogatto
Merge branch 'master' of github.com:frogatto/frogatto
Merge branch 'master' of github.com:frogatto/frogatto
Updated some of the Box2D integration. Added a mouseover_delay to objects, which effects the time before an on_mouse_enter event is generated.
A couple of widget modifications.
Added sha1() function.
Slight fix for the way frame gui elements are drawn. Prevents overlap in the case of transparent corners.
Some updated to .gitignore