General tweaks.
Moved Thaed::manageKeyboardEvents() and Thaed::manageJoystickEvents() to end of thaed.cpp, to mirror layout found in thaed.hpp. Removed std::stringstream from routines.hpp, because it was not being invoked. Removed al_ prefix from all Allegro variables in routines.hpp and routines.cpp, to reduce redundancies. Improved general documentation.