Naming and spacing updates in leontief lab.
Grammar and spacing edits to leontieff lab.
Merge branch 'master' into leontief
Merge branch 'master' into leontief
Implemented Dr. Jarvis's suggestions for the Leontief lab.
Added the problem suggested by Dr. Humpherys to the Leontief lab.
Uncommented data-based problem in leontief lab.
Merge pull request #335 from insertinterestingnamehere/leontief

Leontief