[fixes #55185308] Set port dynamically for default_url_options, update

Minor change to this commit.  The previous implementation crashed the
console `uninitialized constant Rails::Server (NameError)`.  This uses
a ternary operator to set the value of action_mailer's
default_url_options[:port].
upgrade Rails to 3.2.14
[Completes #52331399] Users can update their email address -
Clean up view, add flash notice, display unconfirmed email instead of confirmed email.
[Fixes #54204778] Notifications badge does not update when records are deleted.
added section about the configuration files
Merge branch 'master' of https://github.com/GSA-OCSIT/mygov-account
Configure Devise to use MAX.gov production servers in staging and production.
[completes #55184916] User sees dates attached to activity log items
[completes #55658046] add secure_headers gem to rails apps
[completes #56020628] User sees activity log items grouped by date
[fixes #54907818] css errors in discover bar buttons
Upgrade brakeman gem; fix regular expressions to use \A and \z instaed of ^ and $
[fixes #56612692] Password fields do not have autocomplete="off" set
[Completes #56621192] Remove forms API from account