V2.07 with changed bat/batcat defaults, better json support

When bat/batcat is used to colorize the output, the style is now set to plain and the theme to ansi . This is a compromise for dark and light terminal backgrounds and more resembles the output without that filter. Changing the style and theme can be done in the bat config file, using the BAT_THEME and BAT_STYLE environment variables or be given as an option in the LESSCOLORIZER variable as described in the man page.