Add page class to CCLA Signature show page.

The page class was missing, causing the page to look a little funky.
Use correct path for sidekiq logs

The log path was incorrect for sidekiq in production, this corrects
that.
Ensure mailer css is compiled

This enables precompilation of mailer css.
Merge pull request #278 from opscode/sidekiq_logs

Use correct path for sidekiq logs
Merge pull request #279 from opscode/mailer_scss

Ensure mailer css is compiled
Merge pull request #276 from opscode/ccla_signature_show_fix

Add page class to CCLA Signature show page.
Fix mail preview for cookbook follower notification

The mail preview method was calling the wrong mailer method and
we also need some seed data for this preview to work.
Add text mailer layout

Add text mailer layout with the common footer.
Absolute path for cookbook version notification

Mailers require absolute paths so this links to the full path of the
cookbook version notification.
Add missing cookbook version notification text format

Add text format of cookbook version notification email.
Merge pull request #280 from opscode/mailer_fixes

Mailer fixes
Allow Supermarket to use S3

The current community cookbooks are hosted on S3 so Supermarket
must be able to support S3 for cookbook storage. Now if both a S3 bucket
is set paperclip will be configured to use S3 otherwise it will use
local storage. This is done so the application is not dependent upon S3.