

Example usage:

yolk -n
    List only the non-activated (--multi-version) packages installed

yolk -a
    List only the activated packages installed
    (Activated packages are normal packages on sys.path you can import)

yolk -l -f License,Author
    Show the license and author for each installed package

yolk -H twisded
    Launches your web browser at Twisted's home page

yolk -M Paste 1.0
    Show all the metadata for Paste version 1.0

yolk -M Paste
    Show all the metadata for each version of Paste listed on PyPi

yolk -D cheesecake
    Show all URL's for cheesecake packages you can download


