Created a method to face any MeshComponent to a GLCamera;
Modified Theme class: new methods for colour creation and conversion;
New Headline constructor;
New Vec rotation methods by cardinal orientation and clockwise or counterclockwise;
Subclasses of Setup can now change the loading text and background;
Subclasses of Setup can now use the new ErrorHandler, instead of its deprecated version, and allow the user to send emails to the developer if an error occurs;
Major changes: