byteflow friends branch, r2

requires byteflow post-0.7rc -- http://hg.piranha.org.ua/byteflow/

usage:
$ cd /path/to/byteflow/workdir
$ hg pull path/to/byteflow-friends.bundle
$ hg merge
$ hg commit -m 'Merge byteflow-friends'
$ less apps/friends/__init_