Update version to 0.4.3
Recognize full Unicode alphanumerics in doc slugs Fixes documentcloud#37
Add v0.4.1 items to changelog
Update README and bump version number to 0.4.0
Remove unused TinyMCE components
Update version and readmes
Update changelog and bump version number
Merge pull request documentcloud#21 from documentcloud/oembed Generate embed codes through DocumentCloud's oEmbed endpoint