On signup: tell user to check their spam folder too for the email

pkg/controller/account/signup.go

@@ -177,6 +177,10 @@ func Signup() http.HandlerFunc {
 				}
 
 				session.Flash(w, r, "We have sent an e-mail to %s with a link to continue signing up your account. Please go and check your e-mail.", email)
+
+				// Reminder to check their spam folder too (Gmail users)
+				session.Flash(w, r, "If you don't see the confirmation e-mail, check in case it went to your spam folder.")
+
 				templates.Redirect(w, r.URL.Path)
 				return
 			}