Better rendering and javascript initialization (@andybak / #2)

jsignature/templates/jsignature/widget.html

@@ -0,0 +1,8 @@
+<div class='jsign-wrapper'>
+  {{ hidden }}
+  <div id='{{ jsign_id }}'
+       data-config='{{ config }}'
+       data-initial-value='{{ value }}'
+       class='jsign-container'></div>
+  <input type='button' value='{{ reset_btn_text }}' class="btn">
+</div>