Fix broken link to exercise readme. Fixes #1454
Fix malformed URLs in hibernation email
Merge branch 'pull-1455'
Add more seed data for x-api
Add a very basic structure for the redesign
Pencil in help page in redesign
Add placeholders in redesign
Add a scrollbar to sidebar when there are lots of notifications
Fix the floating delete notifications link
Merge pull request #1456 from jessabean/sidebar_overflow

Sidebar overflow
Refactor to use settings.development?
Merge pull request #1460 from michaelavila/use_settings_development

Refactor to use settings.development?
Add instructions for installing and using HLint
Merge pull request #1462 from soapie/master

Add instructions for installing and using HLint
Upgrade puma
Upgrade activerecord
Update redcarpet
Upgrade pony
Upgrade newrelic_rpm
Upgrade sqlite3