[Issue #209] Send email after status change

Send email notification when a service request status has changed.
Added Sidekiq
Ignoring coverage folder
Added Redis dependency on README file
Merge pull request #215 from eddie-ruva/features/user_mailer

[Issue #209] Send email after status change
[Issue #214] New report view UX

Removes title attribute from service request
Moves service type select field to the top of the form
Moves image field to the bottom of the form
Zoom on pin when creating a service request
Set call to action style on new service request link