Add remaining clients (#20) * add clients, update vpb client to pb client * add tests * fix test name * modify changelog * leave vpb as is,add new pb client * upgrade version, fix javadocs * fix javadoc * add all clients * Update CHANGELOG.md Co-authored-by: Matt Wisniewski <mwisniewski@jwplayer.com> Co-authored-by: Matt Wisniewski <mwisniewski@jwplayer.com>