Use cache store for cookies
Use mem_cache_store in production
Add custom sessions controller
Simplify OauthController
Fix missing include
Add generic auth failure page
Remove commented out code
Add dalli gem for production memcached
Fix missing flow param
Cleanup signup template
Remove social links from navigation
Remove OmniAuth.on_failure override

This was originally used to add origin param
to the failure redirect. But this is now part
of omniauth default behavior.
Change routes /auth to /o
Cleanup routes
Add providers to login page