Added Contact:getFixtures and Body:getContactList (see issue #905).

The list of Contacts associated with bodies changes during World:update (potentially multiple times), so you might miss collisions if you don't use the World callbacks at all.

src/modules/physics/box2d/wrap_Body.h

@@ -85,6 +85,7 @@ int w_Body_setFixedRotation(lua_State *L);
 int w_Body_isFixedRotation(lua_State *L);
 int w_Body_getWorld(lua_State *L);
 int w_Body_getFixtureList(lua_State *L);
+int w_Body_getContactList(lua_State *L);
 int w_Body_destroy(lua_State *L);
 int w_Body_setUserData(lua_State *L);
 int w_Body_getUserData(lua_State *L);