Added instructions and sample file.

On branch CH13
Changes to be committed:
   (use "git reset HEAD <file>..." to unstage)

	new file:   Exception_Handling_Exercises/ExceptionExercises.exe
	new file:   Exception_Handling_Exercises/Exception_Handling_Exercises_20101117.pdf
Initial commit, no work completed.
Layout of Windows form complete.
Variables, conversions, and success output implemented.  No exception handling.
Overloaded method DisplayMessage added.
Added exception handling (catch blocks) and moved DisplayMessage to try block.
Moved variables back to field level and implemented bool successful to determine whether success message displays.
Bool was not returned to "true" once changed to false.
Exercise2 complete.  Exercise3 created but contains blank form and no code.
Odometer and OdomException classes created.  Form still blank.
Exercise3 complete.
Not sure why this didn't apply from the VS commit.
Fixed issue with Exercise2 (was in another folder outside the rest of the project).
Small change to solution after VS closed.
Changed Exercise2 assembly name.
Small change to .suo file after VS closed.
.zip file added
Added instruction and sample folders for the two assignments
Project and class set up with descriptions.  No code implemented yet.
IsStringInteger method complete.  Started ParseSelectedItem method.