Make it possible to add more parameters to post template

contrib/templates/default/post.mustache

@@ -1,31 +1,31 @@
-<div id="{{PostHash}}" class="{{CSSClass}}">
+<div id="{{post.PostHash}}" class="{{post.CSSClass}}">
   <legend class="postheader">
     <span class="origin">
-  {{#IsI2P}}
-    <img src="{{Prefix}}static/i2p.png" title="post from i2p" />
-  {{/IsI2P}}
-  {{#IsTor}}
-    <img src="{{Prefix}}static/tor.png" title="post from tor" />
-  {{/IsTor}}
-  {{#IsClearnet}}
-    <img src="{{Prefix}}static/clearnet.png" title="post from clearnet" />
-  {{/IsClearnet}}
+  {{#post.IsI2P}}
+    <img src="{{post.Prefix}}static/i2p.png" title="post from i2p" />
+  {{/post.IsI2P}}
+  {{#post.IsTor}}
+    <img src="{{post.Prefix}}static/tor.png" title="post from tor" />
+  {{/post.IsTor}}
+  {{#post.IsClearnet}}
+    <img src="{{post.Prefix}}static/clearnet.png" title="post from clearnet" />
+  {{/post.IsClearnet}}
     </span>  
-    <span class="subject">{{Subject}}</span>
-    <span class="name">{{Name}}</span>
-    <time datetime="{{DateRFC}}">{{Date}}</time>
-    <a href="#" class="postnol">No.</a><a class="postno" onclick="nntpchan_backlink('{{ShortHash}}');" title="{{MessageID}}">{{ShortHash}}</a>
-    <a href="{{PostURL}}">[Reply]</a>
-    <span class="tripcode">{{{Pubkey}}}</span>  
+    <span class="subject">{{post.Subject}}</span>
+    <span class="name">{{post.Name}}</span>
+    <time datetime="{{post.DateRFC}}">{{post.Date}}</time>
+    <a href="#" class="postnol">No.</a><a class="postno" onclick="nntpchan_backlink('{{post.ShortHash}}');" title="{{post.MessageID}}">{{post.ShortHash}}</a>
+    <a href="{{post.PostURL}}">[Reply]</a>
+    <span class="tripcode">{{{post.Pubkey}}}</span>  
   </legend>
-  {{#Attachments}}
+  {{#post.Attachments}}
     <figure>
     <figcaption>
     <a href="{{Source}}" title="{{Filename}}" target="_blank"><img src="{{Thumbnail}}" alt="{{Filename}}" class="thumbnail"/></a>
     </figcaption>
     </figure>
-  {{/Attachments}}
+  {{/post.Attachments}}
   <div class="post_body">
-    {{{RenderBody}}}
+    {{{post.RenderBody}}}
   </div> 
 </div>