Add password reset

Closes #15

views/login.erb

@@ -4,7 +4,7 @@
   <p class="error"><%= @error %></p>
 <% end %>
 
-<form action="/login" method="POST">
+<form action="/login" method="post">
   <p>
     <label for="email"><%= _("Email") %></label>
     <input type="text" name="email">
@@ -15,4 +15,5 @@
   </p>
   <button type="submit"><%= _("Login") %></button>
 </form>
-<a href="/signup"><%= _("Create account") %></a>
+<p><a href="/signup"><%= _("Create account") %></a></p>
+<p><a href="/reset"><%= _("Reset password") %></a></p>