Support Node.js 0.10–6 (#132)

* Update dependencies

* Switch from jsdom to cheerio

* Update the supported Node.js versions

* Recompile the client-side CSS and JS

view/helper/string.js

@@ -2,10 +2,10 @@
 
 module.exports = helper;
 
-function helper(register) {
+function helper(hbs) {
 
 	// Convert a string to lower-case
-	register('lowercase', function(context) {
+	hbs.registerHelper('lowercase', function(context) {
 		return context.toLowerCase();
 	});