Add support for node.js npm module

Author: demchenkoe

README.md

@@ -1,5 +1,10 @@
 # Underscore.js global template helpers
 
+### Install
+
+	npm install underscore-template-helpers
+
+
 This [underscore.js](https://github.com/documentcloud/underscore) mixin allows you to define global template helpers that will be available in all your underscore templates. For example, you can define aa "if and only if" function that will only output text if its first argument evaluates to `true`:
 
 	_.addTemplateHelpers( {

package.json

@@ -0,0 +1,24 @@
+{
+  "name": "underscore-template-helpers",
+  "version": "0.0.1",
+  "description": "Underscore.js global template helpers",
+  "main": "underscore.template-helpers.js",
+  "dependencies": {
+    "underscore": "~1.5.1"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/demchenkoe/underscore-template-helpers.git"
+  },
+  "keywords": [
+    "underscore",
+    "template",
+    "helpers"
+  ],
+  "author": "David Beck",
+  "license": "https://raw.github.com/demchenkoe/underscore-template-helpers/master/LICENSE.html"
+}

underscore.template-helpers.js

@@ -1,4 +1,15 @@
 (function() {
+
+	if(typeof _ === 'undefined') {
+		if(typeof module === 'object' && typeof module.exports === 'object') {
+			//this is node.js
+			var _ = require('underscore');
+		}
+		else {
+			throw 'please include the "underscore" library';
+		}
+	}
+
 	var originalUnderscoreTemplateFunction = _.template;
 	var templateHelpers = {};
 
@@ -33,4 +44,4 @@
 			return wrappedTemplate;
 		}
 	} );
-} )();
+} )();