Disable smooth scaling by default on Pandora.
Fix crashes with entities deleted without checking refcount (fix #305).

This bug appeared in commit aecdfce, which exports more entities to Lua.
Add a method map:get_music() (fix #306).
Reindent.
Reindent.
Fix a crash due to carried item refcount (fix #307).
Reindent.
Coding style.
Coding style.
Reindent.
Remove useless condition.
Fix an error message.
Fix camera callbacks when already on the target (fix #308).
Fix camera movement on maps smaller than the quest size (fix #310).
Revert "Fix camera callbacks when already on the target (fix #308)."

This reverts commit 58bb599535564e0cd5888774488ac7437bb83212.
Fix a crash when calling hero:start_victory() without sword.
Fix camera callbacks when already on the target (fix #308).
Update changelog.
Fix slowness in PathMovement on slow machines (fix #311).
Fix freeze with PathFindingMovement since commit 311cb9b.