add "authors" to series info
implement default empty search_by_author
implement search by author for kissmanga
show authors in UI, add search by author

Also fix bug in User.author property declaration: repeated property must
not have `default` value
link to "search by author" page from Series page
show "unknown" for empty desc array
move author info up
add bowerrc force correct bower dir
add __init__ to test dir, delete wrong comment in kissmanga test
implement search by author on batoto
Merge branch 'master' of https://github.com/nhanb/pytaku

Conflicts:
	pytaku/api/api.py
Fix pep8
Add field author