added notes on purpose of the mustache subclasses.

HandlebarMustache.php

@@ -6,6 +6,9 @@
  * This is an extended Mustache class which contains file handling for templates
  * and partial templates.
  *
+ * Once it's a bit more complete, this class will be merged with the parent Mustache class
+ * to provide a full-featured view layer...
+ *
  * @extends Mustache
  */
 class HandlebarMustache extends Mustache {

TraversableMustache.php

@@ -3,6 +3,8 @@
 /**
  * TraversableMustache class.
  *
+ * This is an implementaiton of the DOT_NOTATION pragma.
+ *
  * A Mustache subclass which allows variable traversal via dots, i.e.:
  *
  * @code