Added automatic update functionality.

• Checks for updates regularly, and downloads them if available
• Download specific types of updates (none, all, patches, stable, ...)
• Option to run commands when an update has finished downloading

Let recipes in the recipes.yml config use & for color codes.
Added spaces between config.yml sections.
Added debug output option to config.yml.
Added methods to the FastCraft+ API.
Other internal bug/performance fixes.