* smooth camera with vectors
* add smooth cam support to map engine test
smooth cam now works in map engine test.
clicking or holding the left-mouse button will move the camera.
also works with freecam mode in single-player.
* Update ebiten_renderer.go
did not mean to edit this file
* Comments and newlines in engine.go
* Comments and newlines in object.go
* Comments and newlines in animated_entity.go
* Comments and newlines in missile.go
* Comments and newlines in npc.go
* Comments and newlines in player.go
* Removed object.go (incorrectly merged it in during rebase).
* Comments and newlines in renderer.go.
* Comments and newlines in map_entity.go.
* Comments and newlines in walk_mesh.go.
* Comments and newlines in viewport.go and tile_cache.go.
* Comments and newlines in stamp.go and wilderness_tile_types.go.
* Comments and newlines in everything else.
