init: Initial Commit

pMenu assignment rewritten to use .jar file with Menu interface and an
implementation.

rubric- removed implementation details for XXXMenu class.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch main
#
# Initial commit
#
# Changes to be committed:
#	new file:   .gitignore
#	new file:   data/calculator.menu
#	new file:   lib/bclMenu.jar
#	new file:   pUsingMenu.pdf
#	new file:   pUsingMenu.tex
#	new file:   rubric-pUsingMenu.org
#	new file:   src/Menu.java
#
