Implemented Multiple Players

Extensive commit. Mostly completed except need new buttons for New
Player and possibly some other buttons. I’m just reusing some we
already have temporarily. This is all managed through a properties file
which has a lot of error checking to make sure it actually exists and
if it doesn’t to create it and set ticket values correctly. I will add
comments in a later commit.
Merge branch 'master' of https://github.com/Elinor78/Bingo

Conflicts:
	MessageDialog.java