add cleaner for APT package lists
removes the locally cached package lists in /var/lib/apt/lists. From https://en.wikipedia.org/wiki/Advanced_Packaging_Tool:
/var/lib/apt/lists/: storage area for state information for each package resource specified in sources.list

fixes az0/cleanerml#24
Merge pull request #2 from nodiscc/master

add cleaner for APT package lists