Prompt user before resetting the app

Closes #156.

assets/javascripts/templates/notif_tmpl.coffee

@@ -12,7 +12,7 @@ app.templates.notifUpdateReady = ->
 app.templates.notifError = ->
   textNotif """ Oops, an error occured. """,
             """ Try <a href="javascript:app.reload()">reloading</a>, and if the problem persists,
-                <a href="javascript:app.reset()">resetting the app</a>.<br>
+                <a href="javascript:if(confirm('Are you sure you want to reset DevDocs?'))app.reset()">resetting the app</a>.<br>
                 You can also report this issue on <a href="https://github.com/Thibaut/devdocs/issues/new" target="_blank">GitHub</a>. """
 
 app.templates.notifInvalidLocation = ->

assets/javascripts/templates/pages/offline_tmpl.coffee

@@ -33,7 +33,7 @@ app.templates.offlinePage = (docs) -> """
     <dt>I found a bug, where do I report it?
     <dd>In the <a href="https://github.com/Thibaut/devdocs/issues">issue tracker</a>. Thanks!
     <dt>How do I uninstall/reset the app?
-    <dd>Click <a href="javascript:app.reset()">here</a>.
+    <dd>Click <a href="javascript:if(confirm('Are you sure you want to reset DevDocs?'))app.reset()">here</a>.
     <dt>Why aren't all documentations listed above?
     <dd>You have to <a href="#" data-pick-docs>enable</a> them first.
   </dl>