Merge tag '0.6' into develop

Version 0.6
feat: speaker resources as Annotation
feat: timed outline for episode 1 to 10
style: PEP8
chore: rename "www" to more generic "resources"
chore: rename manual_transcript to manual_transcript_raw
chore: remove obsolete "speaker" json files
chore: get ready for tvd 0.6
git: ignore IPython notebook checkpoints
doc: add CHANGELOG for 0.7
Merge branch 'release/0.7'