Update TODO

TODO

-put full path in .fehbh
-
 caching of thumbnails doesn't seem to take thumbnail size into account.
 Change sizes and you get the old thumbs....
 
-specifying --action1 but not --action segv's feh.
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-Feel free to add stuff to it. I am very happy to delete any lines other
-people add =P
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 Option --autograb for feh to grab keyboard - so you can control feh without
 having to focus it. Have to be a bit careful with this but could be useful.
 
 Now we have 10 --action* options, would be nice to hit a key and get a text
 overlay reminder showing what each one does :p
 
-option to hide mouse cursor in full screen..
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 key/option/signal/timeout to totally reload filelist (rescan directories etc)