Added unit tests.
Update PlayPingPong.java

moved formatting of output string to thread safe method. & fix logic bug.
updated Assignment Desc.
Merge pull request #44 from mawalker/master

Update to Assignment Desc. & concurrency bug fix
Added bug fixes.
removed old project(s)
added 'hidden' files to removed list
new projects now import and compile & run properly
Merge branch 'master' of github.com:douglascraigschmidt/POSA-14

Conflicts:
	assignments/week-5-assignment-4/W5-A4-Android/Assignment-Description.txt
	assignments/week-5-assignment-4/W5-A4-Android/src/edu/vuum/mocca/PlayPingPong.java
Merge pull request #46 from mawalker/master

Update to Week 5 Assignment 4
Moved Assignment-Description.txt to the top directory.
Added back the command-line variant.
Updated the Assignment-Description.txt.
Changed formatting to be left justified.