Cleanup email form when pending change

* Add missing Bootstrap 3 classes
* Move cancel and resend buttons beneath form field
* Visually separate the change email form and the resend email form
Improve re-sent email copy

“Successfully resent email change email” is a bit of a mouthful. Also,
resent is not re-sent.
Merge pull request #275 from alphagov/pending-email-change-form

Cleanup change email form when there's a pending change
Robustify the unsuccessful login logging.

Currently if someone nefarious messed with the params such that
`params[:user][:email]` was a hash instead of a string, this logging
would blow up when trying to lookup the attempted user.

And before anyone says anything, robustify is a perfectly cromulent
word.
Merge pull request #276 from alphagov/robustify_unsuccessful_login_logging

Robustify the unsuccessful login logging.
Align Suspended? check-box with label text

www.agileplannerapp.com/boards/173808/cards/6392
Merge pull request #277 from alphagov/align-suspension-checkbox

Align Suspended? check-box with label text
Upgrade admin gem to 1.1.6

* Fix GillSans font stack for IE and Chrome on Windows
Merge pull request #278 from alphagov/fix-gill-sans

Fix GillSans font stack for IE and Chrome on Windows