Wait for scripts to finish before restarting them.
Don't render head attachments in first person mode.
Set the LOD distance on attachments (controls the load priority, too).
Merge pull request #2825 from PhilipRosedale/master

Fix bug with mirror settings not initialized
Merge pull request #2826 from ey6es/master

Fix for scripts' not correctly removing/reattaching on restart, don't render head attachments in first person mode.
Updated guitar with more chords, key triggers