Adds a direction option to the import command, that causes the imported
icon state is overwrites the specified direction, if nodup is set.
Otherwise, the direction is overwritten on a copy.
Adds options to PNG importing so that any valid DMI file can be entirely built from PNG files and DMITool.
Adds version string and "version" command
Adds info command to get a list of states easily (the only way previously was to print the descriptor with "dmitool -vvvv verify $file" and parse with e.g. grep/sed)
