Load all Post Heders

[fekberg]

Currently only a pre-defined number of post headers are loaded. I suggest that all of the post headers available should be loaded into a dictionary.

Imagine having the following post header:

---
layout: post
title: Don't deadlock with async and await
date: 2013-04-03 15:32
author: fekberg
comments: true
metadescription: Avoid deadlocking your applications when using async and await.
categories: .NET, C#
tags: async, await, csharp, deadlock, Programming

---

In this case, most of them are already defined and loaded by the parser, but tags is the one that isn't loaded.