Design and execute an ability for the module to update itself online

http://projects.colsolgrp.net/issues/136
(dates are relative to October 2011)

Added by tshif

Due to limitations in FreePBX which cannot be easily overcome, modules not hosted in their svn can not ever be allowed to download and upgrade themselves through the same mechanism as standard FreePBX modules.

To overcome this, we can design and implement a simple method to check the most current release of the module online, and allow the user to download and install it right then and there from within the module.

This procedure should be generic enough to be easily adapted to any and all modules hosted here.