Add additional info for admin users of the site

Only invalidated pending and validated signatures
Expose fraudulent domains on petition admin page
Add blacklisting of domains and ip addresses
Clarify hints for domain lists

Introduction of rate limiting

Covers PR's from 507 to 524

More domains and catch ActiveRecord::RecordNotUnique errors

Merge pull request #506 from alphagov/fix-record-not-unique-errors

Fix ActiveRecord::RecordNotUnique errors

More domains and catch Dalli errors

Merge pull request #498 from alphagov/catch-dalli-errors

Catch errors from the Dalli client

Write contentious data in background and improve caching

This restores deploying from master and revokes the work done on production-hotfixes-jun2016 branch by including alternative implementations.

• Writing contentious data in the background:
  • Move petition updating to background - #491
• Better fraud detection:
  • Update disposable domains - 2016_06_26 - 1 - #485
  • Disallow plus addressing in emails - #493
  • Use typographic quotes and apostrophe in error msg - #495
• Improved caching:
  • Cache trending petitions - #494
  • Round petition cache key - #496
• Simplified deploys:
  • Disable the building of the crontab by default - #492

Also includes PRs ready for usual deployment (mostly improvements to admin):

• Infrastructure work:
  • Cache phantomjs download and use our own copy - #478
  • Fix intermittent spec errors - #476
• Admin improvements:
  • Allow moderators to edit creator's name - #475
  • Add counts to admin facet select - #474
  • Add the ability to search by name in the admin area - #473
  • Sort moderation queue by the most recent threshold reached - #472
  • Search for emails case-insensitively in the admin - #471
• Frontend improvements:
  • Send individual emails to sponsors - #470
  • Add freephone number in addition to geographic - #477
  • Move tokens from a path param to a query param - #467

Correct a typo in a domain name

Merge pull request #488 from oskarpearson/disp_domains_2016_06_26_2

Correct domain name

Update list of disposable domains

Merge pull request #486 from alphagov/backport-disposable-domain-changes

Merge pull request #485 from oskarpearson/disp_domains_2016_06_26_1

Update emails to clarify actions and unsubscribe details

Includes:

• Use a string instead of a symbol (#462)
• Add petition actions to subject lines, make email unsubscribe information more specific (#463)

Explain why people are receiving emails

Update the unsubscribe like explanatory text in the emails

Updates to country register and addition of scheduled debate date

Use the new format for the external country register
Additional setup for epets user
Add scheduled debate date to awaiting debate index