Update to r19
- Changes have been made to enable the use of true image previews
- A new LF_COLORS environment variable is now checked to be able to make lf specific configurations.
- Full path, dir name, file name, and base name matching patterns are added to colors and icons
- Multiple -command flags can now be given
- Heuristic used to show info should now take into account number and icons options properly
- Unicode combining characters in texts should now be displayed properly