created conditioning and stability lab.
Merge branch 'develop' into Conditioning_Stability
Wrote Conditioning_stabiltiy lab. First draft.
moved \DeclareMathOperator statement to command.tex file; removed a \usepackage statement from Vol1.tex
Merge branch 'Conditioning_Stability' of https://github.com/KathleenF/numerical_computing into conditioning

Conflicts:
	Vol1.tex
Added a simple example of an unstable algorithm.
Some small changes to the discussion on condition numbers.
Some reformatting of the problems in the conditioning and stability lab.
A few more edits to the problems in the conditioning lab.
Added solutions file for conditioning and stability lab.
A small edit to the solutions file for the conditioning and stability lab.
Merge branch 'master' into conditioning
Merge pull request #573 from insertinterestingnamehere/conditioning

Conditioning