Fixed WeakReference issues.
Updated Assignment-Description.txt.
Yet more fixes for DownloadHandler.
Added new check for a Runtime exception.
Fixed mFailed.
Updated the resources file to add scroll view support.
Made UI prettier for ThreadedDownloads and DownloadApplication
Merge pull request #34 from mitchellgordon95/master

Made UI prettier for ThreadedDownloads and DownloadApplication
Added volatile fixes.
Made the SimpleAtomicLong.java skeletons identical.
Removed the term "hook" since they aren't really being used as hook methods.
Added/enhanced various files.
Fixes.
fixed a comment.
Made acquire() and release() private.
Enhanced the documentation.
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