Add a CHANGELOG and some clarification to the exercises for Part 1
Add CHANGELOG to readme
Update CHANGELOG.md
Add another ls use case
Squashed commit of the following:

commit 0e0cc21c4033fe560975ec7d9b5cb13549ccb4d8
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 19:58:01 2014 -0400

    Add disclaimer

commit b275e2d452d82f8188649b9a9ca4de58d0a43471
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 19:56:55 2014 -0400

    Update CHANGELOG

commit 37f7a75952f9512a435015f2ea0548d1bf304c88
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 19:55:23 2014 -0400

    Add questions for PART 2

commit 731d4d88164a478a4b08c9f3e94b7eb14d56283a
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 19:52:09 2014 -0400

    Add questions for PART 2

commit 1fe88a6716f3bc2751bdcb8a8b8b460353a6a650
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:55:55 2014 -0400

    Wordsmithing

commit 0ff60bfaf6cf0b141c8b299fe508af48908d2cc1
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:55:13 2014 -0400

    Wordsmithing

commit 2b404a876e3685919484ae13eb4cff2174081329
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:49:54 2014 -0400

    Wordsmithing

commit 6282fe23c736b7b283064f68a6c7aa2badccfef1
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:48:28 2014 -0400

    Wordsmithing

commit 5ee636be7226ff5cb55c8b3f47f90c309324507d
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:48:08 2014 -0400

    Wordsmithing

commit 4f1133d35447719db567e7d848044d2b19cc49c9
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:47:47 2014 -0400

    Wordsmithing

commit 31725fb220e84578d2384c36fbdcb4c2497dca6f
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:46:31 2014 -0400

    Add more to part 2 exercise descriptions

commit 1a5bd66761972347e6a89eafe3af32c087a8ff15
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Sat Apr 19 09:42:50 2014 -0400

    Rough draft of Part 2 exercises
Update README
Update README.md
Add link to solutions
Add link to solutions
Update CHANGELOG
Fix typos in PART2 text
Update unpacker.rb
Merge remote-tracking branch 'upstream/master'