Sticky footer

Thanks to http://mystrd.at/data/sticky_footer.html
Add french langage
Moves unicorn and foreman gems to production group in Gemfile
Added suggest link text
Fixed wrong assumptions
Typo
Merges production group definitions
Grr whitespace
Correctly sets the date on a new gift when one is provided.
Includes test.
converting confirmation link text to an actual link

Some mail clients go ahead and convert what look like URLs to
hyperlinks, but not all do.  This actually converts the text to a link.
Fix some minor grammatical issues in English localization.
Capitalise Twitter, GitHub; Remove dupe dashboard.synchronize key

- Should not need to have dashboard.synchronize key twice
- Rewords delete_account.are_you_sure as "check" is the action
  and should instead list the reason

Based on #391 and #399 already being merged
Merge pull request #400 from randomecho/copyedit-locale-en-capitals

Fix Twitter, GitHub capitalisation in en.yml and remove dupe dashboard.synchronize key
Merge pull request #398 from set5think/develop

converting confirmation link text to an actual link
Merge pull request #397 from davefp/fix_date_display_gift_form

Correctly sets the date on a new gift when one is provided.
Merge pull request #367 from davefp/prod_group

Moves unicorn and foreman gems to production group in Gemfile
Fixed redirect_to :back when no HTTP_REFERER present
Don't blow up on erroring users
Actually fix the redirect error
Finnish translation