identify jpg|png|tif
ctrl-f to open folder with xdg-open
new pic/vid extensions
1 to 5 stars
skip unknown extensions when importing
slower keyboard auto-repeat
private methods start with _
use the "best" pics to render folder preview
cosmetic bullshit
better fail message for gphoto2 command
import in main(), not new()
fix cache of folders with spaces
Fix dangling tmpdir when creating video preview.

Sometimes mplayer generates more files, so we use `system "rm -r"`
instead of assuming the dir will be empty after we remove the first
frame.
add 'm4v' to list of known video extensions
when imporing, guess timestamp from the filename