Wagtail Upgrade

[gayathrim]

In Scope:

• Upgrade Wagtail to the latest version
• Site should continue to function like before without any errors.

Defects:

• Some of the Live+Draft articles are throwing 500 error when opened in the same window as the admin (logged into admin) http://staging.ruralindiaonline.org/articles/shut-your-trap/ http://staging.ruralindiaonline.org/articles/the-sting-of-bees-and-the-tyranny-of-tigers/ http://staging.ruralindiaonline.org/articles/%D9%86%D9%88%D9%B9-%D8%A8%D9%86%D8%AF%DB%8C-%DA%A9%DB%92-%D9%82%D8%AD%D8%B7-%DA%A9%DB%8C-%D9%88%D8%AC%DB%81-%D8%B3%DB%92-%D8%A2%D8%AF%DA%BE%D8%A7-%D8%A8%DA%BE%D9%88%DA%A9%D8%A7/
• Gallery Home preview throws Internal server error - Done
• Album Preview before publishing does not work - Done
• View Live option in Articles and FACES homepage throws error - Done