Wafer 0.9.1

A minor update to wafer 0.9.0

New features:

• Bulk status changes for talks, in admin

Bug fixes:

• Display schedule times in the event local timezone, in admin
• Correct the count of reviews on each talk
• Fixed some missing html tags in the page version comparison template.
• Metadata updates (for changes that predated this release)
  • Declare requirement on drf-extensions >= 0.5.0
  • Update, python supported version trove classifiers

Misc:

• Translation updates
• Template whitespace cleanup