Feature: Adjust brightness on the fly using shortcuts or gui
During evening/night i tend to need more than just day and night settings for brightness.
It would be great is the brightness could be set/overruled directly for session using the gui or some configurable shotcuts ala f:lux's <Alt>+<PgDn> etc.
The GUI thing has been an issue for some time now. Shortcuts however, I think, is a new idea.
The GUI can be implemented when issue #54 is done. Then, shortcuts could also be implemented by adding command line options to redshift to modify and use xbindkeys to run redshift with those options.
Hotkeys could be added now if you disable automatic adjustments. For instance you can write a small script that runs redshift -O $temperature and stored $temperature to a file in /tmp and can read that file to figure out the new temperature if an increasement or decreasement is requested.
If you want hotkeys as described it the second paragraph, I just wrote https://github.com/maandree/redshift-adjust for that.
Related to #31 (almost duplicate)
GUI Slider added in #674