Add password reset

Closes #15

views/reset_change.erb

@@ -0,0 +1,21 @@
+<h1><%= _("Reset password") %></h1>
+
+<% if @errors %>
+<% @errors.each do |error| %>
+  <% if error.attribute == :password and error.type == :blank %>
+  <p class="error"><%= _("Specify a password.") %></p>
+  <% end %>
+<% end %>
+<% end %>
+
+<form action="/reset/<%= params[:uuid] %>" method="post">
+  <p>
+    <label for="email"><%= _("Email") %></label>
+    <span><%= @user.email %></span>
+  </p>
+  <p>
+    <label for="password"><%= _("Password") %></label>
+    <input type="password" name="password" value="<%= params[:password] %>">
+  </p>
+  <button type="submit"><%= _("Reset password") %></button>
+</form>