ver 1.4.8 More work on Twilight Transitions

I have got the sunset tansitions working OK but
still need more work on sunrise twilight transitions.  Also added a
movefiles.sh.  This moves all files in the images folder to another
folder (in my case a mounted folder share across the network. Since the
current image file might be updating this script bypassed the latest
file thus avoiding problems.  Been working good for about a week now.
rpi-timelapse.py currently has some redundant logic in it but have
commented and will clean up after more testing.