Fixed #267 Email verification feature (#268)

* <Implemented basic welcome email upon signup>

* <Added config option to enable>

* <Added verification link routing>

* <Added views for verify/resend and reconfigured routes>

* <Finished Verification System minus Rspec changes>

* <Fixed code style>

* <Modified dome rspec tests>

* <Switched sample env back to default>

* <Added test cases to increase code coverage>

* <Added test_helper>

* <Minor code changes>

* <Added requested changes>

* <Added requested changes>

* <see if this fixes migration>

* <see if this fixes migration>

* <fixed migrations>

* Delete .rake_tasks~

* Update _confirm_button.html.erb

* Update _resend_button.html.erb

* Update verify_email.html.erb

* Update verify_email.text.erb

* <Fixed bugs>

* <Added validation of verification link and fixed some code style>

* <Disabled updating email for omniauth>

sample.env

@@ -61,6 +61,25 @@ LDAP_PASSWORD=
 #
 ALLOW_GREENLIGHT_ACCOUNTS=true
 
+# Set this to true if you want GreenLight to send verification emails upon
+# the creation of a new account
+#
+# SMTP variables can be taken from the list in the following table:
+#
+#   (SMTP_SERVER= SMTP SETTINGS)
+#   (SMTP_DOMAIN= URL)
+#
+#   https://serversmtp.com/smtp-server-address/
+#
+GREENLIGHT_MAIL_NOTIFICATIONS=true
+SMTP_SERVER=smtp.gmail.com
+SMTP_PORT=587
+SMTP_DOMAIN=gmail.com
+SMTP_USERNAME=youremail@gmail.com
+SMTP_PASSWORD=yourpassword
+SMTP_AUTH=plain
+SMTP_STARTTLS_AUTO=true
+
 # Prefix for the applications root URL.
 # Useful for deploying the application to a subdirectory, which is highly recommended
 # if deploying on a BigBlueButton server. Keep in mind that if you change this, you'll