Fix #72 'Dust helpers empty on server side'; Merge #64 'Use iteration to populate dust.helpers'
Refactor and clean up spec runners for node, add unit tests for require('dustjs-helpers')
Catch up to latest version of dust core and fix failing unit test
Fix failing npm install in node 0.8 https://github.com/jshint/jshint/issues/1681
Merge pull request #73 from kate2753/dustGlobalTest

Extend the dust.helpers object instead of  clobbering.