add grunt-release to automate releases

Gruntfile.coffee

@@ -0,0 +1,3 @@
+module.exports = (grunt) ->
+
+  grunt.loadNpmTasks 'grunt-release'

package.json

@@ -28,6 +28,8 @@
   },
   "devDependencies": {
     "chai": "^1.9.1",
+    "grunt": "^0.4.5",
+    "grunt-release": "^0.7.0",
     "mocha": "^1.21.4",
     "q": "^1.0.0",
     "xml2js": "^0.4.1"