Template Engine Consolidation for DocPad

Adds support for a number of template engines to DocPad, using Consolidate.js.

Convention:

.anything.(atpl|dust|eco|ect|ejs|haml|haml-coffee|handlebars|hogan|jade|jazz|jqtpl|just|liquor|lodash|mustache|qejs|ractive|swig|templayed|toffee|underscore|walrus|whiskers)

Usage

Install the library for the desired template engine:
```
npm install --save ejs
```
Use the template engine in a file such as src/documents/test.html.ejs:
```
---
title: EJS
---

<p>This is <%= document.title %></p>
```

Configure

It is possible to toggle which supported template engines are rendered using Consolidate.js, by editing your DocPad configuration file:

plugins:
	consolidate:
		atpl: true
		dot: true
		dust: true
		eco: true
		ect: true
		ejs: true
		haml: true
		'haml-coffee': true
		handlebars: true
		hogan: true
		jade: true
		jazz: true
		jqtpl: true
		just: true
		liquor: true
		lodash: true
		mote: true
		mustache: true
		nunjucks: true
		qejs: true
		ractive: true
		swig: true
		templayed: true
		toffee: true
		underscore: true
		walrus: true
		whiskers: true