Fixed several problems courtesy of jamiejones:
The parsing for the SWF url was wrong (the "//" are now escaped and the
initial .*match needs to be 'ungreedy'), so the -W setting to rtmpdump
was not set, causing the decryption of the video to be wrong.
Finally, add "&has_verified=1" to the fetch of the HMTL page to
allow fetching of age-restricted videos.
Numbering downloaded URLs was implemented with %(ord)s in the
output template. It has been replaced with the %(autonumber)s
sequence and is now also available as a command line switch.
As part of the changes, the program now downloads the highest quality version
by default and uses fmt_url_map to decide which formats are really available.