Updated pgxtra.py to use a Tester class; refactored PgxtraWidget to use a singleton PgxtraUtility; refactored PgxtraUtility to use a dictionary for all widgets.
Merge branch 'master' of https://github.com/CodeSkool/SimpleGUI2Pygame

Conflicts:
	Code/utilities_1.1/pgxtra.py
Merge branch 'master' of https://github.com/CodeSkool/SimpleGUI2Pygame
Merge branch 'master' of https://github.com/CodeSkool/SimpleGUI2Pygame
Added the .gitignore file to git.