Improvements to youtube-playlists:
- new -i option to print only video IDs
- increament max results reported by the cli from 25 to 50
- add support for listing of favorite lists
- make PL prefix in playlist ID mandatory
- documentation updates after above changes
Fix regress tests
New youtube-playlists features:
- new -n option to normalize given URLs, acts also as dry run
- new -u option to parse given arguments as YouTube usernames and list their video uploads
- Download.pm gets new method user_id() to parse URLs and return YouTube username
- documentation updates
- regress for above method
- the tools still has max results limit of 50 items, for a given playlist or user uploads
Move regress tests out of t/private/ to t/
add dot.travis.yml for Travis continuous integration service
tabs to spaces
Merge branch 'master' of github.com:kucharskim/p5-www-youtube-download into kucharskim-master

Conflicts:
	bin/youtube-playlists
cleanup
Merge branch 'kucharskim-master'