Add migration for moviegoers
Moviegoer generation and code from book.
Tweak margin and padding
Add dummy twitter link and collapsable nav (for mobile)
Add omni auth for twitter to gemfile
Move collapsed navbar button into partial
Generate a sessions controller
Add initializer for twitter
Change back to 60px for flash messages
Implement before actions (rename from before filter)
Update routes for omniauth twitter
Use symbols instead of strings for hash keys.
Include conditional navbar content.
Remove redirect in action filter
Merge branch 'ch-7.2'