use the proper html5 email control
[FIX] Changed alert to error

When a user signed-in with invalid credentials no flash message
informing of the fact was previously visible.
Added capybara-email

Added capybara-email to make integration testing for email easier
default from email address set in env

The default email address from the env is now pulled through from the
env variables
Use rails configuration for from email
Password reset workflow and functionality