Bridge cEnemyStopper to mruby scripting interface.
Bridge cGoldpiece to mruby scripting interface.
Bridge cJumpingGoldpiece to mruby scripting interface.
Add Activate event to goldpiece
Add mruby object creation functions to cEnemyStopper and cGoldpiece
Bridge falling goldpiece to mruby and correct jumping goldpiece
Fix copy-paste error
Move Handle_Collision_Player() to cPowerUp, add Activate event to powerups.
Add missing mruby object creator to cMoon
Merge branch 'devel' into more-scripting
Merge branch 'more-scripting' into devel