more colors

ADDED
-added stage and actor libraries to put "buttons" to change the
paintbrush color.
-set up input multiplexor for multiple event handling
-code comments for both files.
NOT FINISHED.
-button class needs to be split into its own file.
-need to change buttons to use shape rendering to remove png dependency.
OTHER NOTES.
-Github keeps changing my file EOL to windows format.
-buttons depends on red blue green.png in asset folder.
-no code removed.