v2.1.1

Added

• Started internationalization on landing page text.
• Styled pages for 404's, 500's, and maintenance mode.
• Added Heroku app notebook-static for serving up maintenance mode pages.

Changed

• Upgraded from Rails 4.2.5 to 4.2.7 to fix a couple potential security issues.
• Now using a Markdown rendering singleton instead of creating a new instance with every page load.
• Renamed Heroku app to production-1.
• Moved sign-in/sign-up links from navbar to sidebar on mobile.
• Serendipitous now asks questions about all content types, not just core content types.
• Serendipitous now tries up to 5 times to generate a question before giving up.

Fixed

• Custom attributes on content should now export correctly.
• Content should no longer show up in its own content-link dropdowns.