Update helpers.php

A patch for when people are using nginx (or any other webserver) instead of apache to serve Taskboard. This adds an helper function from php.net and replaces the apache_ functions with the generic getallheaders, that is supported since php 5.3.
Update helpers.php

Forgot to remove a char.
Adds a Nginx configuration file that will implement all the rewrite rules of the htaccess files. This requires that php5-fpm is also installed.
Adds a Dockerfile for use with Docker. This is based on ubuntu trusty and nginx. Use this file in combination with the nginx configuration and the patch to helpers.
Merge pull request #10 from alex3305/patch-1

Update helpers.php
Merge pull request #12 from alex3305/docker-nginx

Dockerfile for Taskboard
Merge pull request #13 from kiswa/master

Merge master into dev
Merge pull request #11 from alex3305/nginx-conf

Nginx Configuration
Merge pull request #14 from kiswa/dev

Merge pull request #13 from kiswa/master