Revision 1377658

TREQ-16 - Upgrade to mustache java implementation 0.8.1 
 - replace com.github.spullara.mustache.java.core-0.6.2 and com.github.spullara.mustache.java.builder-0.6.2 with com.github.spullara.mustache.java.compiler-0.8.4
 - remove MustacheScopeMap, mustache replaced its "Scope" class with just a Map<String,Object>
 - remove MustacheRenderer.getResourceStream(..). Such behaviour is now defined in a custom MustacheFactory passed in through the constructor,
 - design MustacheRenderer for extension,
 - add MustacheRenderer.getThreadLocalRequest() allowing custom MustacheFactory implementations access to the current tiles' Request object.