Added shells for assignment 0
Updated AtomicLongTest.java to use the Command pattern to simplify the code.
Fixed the comment for decrementAndGet()
Added more links to tutorials on CountDownLatch
Added the ThreadedDownloads application, which is the focus of several videos in Section 1: Module 3: Android Concurrency frameworks
Some Improvements for the ThreadedDownloads example
-also, some git-related housekeeping, to keep student's repos as clean as possible.
Renamed the files to reflect the new naming convention.
Added the new assignment 0.5, which focuses on creating a SimpleSemaphore that implements "Fairness".
Converged all the assignments so they build on each other in a linear sequence.
Merge branch 'master' of https://github.com/mawalker/POSA-14 into mawalker-master

Conflicts:
	ex/ThreadedDownload/src/edu/vuum/mocca/ThreadedDownloads.java
Some light editing and reformatting.
Fixed a few bugs.
Fixes to document the behavior of the tests better.
Improved the documentation about the tests.
Zapped unnecessary static.
Added a new test illustrating how to use Java Threads.
Improved the debugging diagnostics for PalantirManagerTest.java
Enhanced the test so that it prints out more info in case problems occur.
Renamed all the directories to indicate the order of the weeks.
Enhanced the test to fail better.