Start 0.10.1 development

Lots of releases the past few days, most of it because I've been doing some
last minute polishing for the TEST release.
Change OAuth and Brave Core dependencies into optional ones
Upgrade To Flask-OAuthlib 0.7.0

I can remove the workaround for 0.6.0 now, yay!
Release 0.10.1: I Don't Need That

Auth method specific dependencies are now optional.
Merge branch 'master' into release

* master:
  Release 0.10.1: I Don't Need That
  Upgrade To Flask-OAuthlib 0.7.0
  Change OAuth and Brave Core dependencies into optional ones
  Start 0.10.1 development