Minor revisions to pages 3 and 4.
Revisions to page 2 of the wrapping lab.
Revisions to pages 4-7 of the wrapping lab.
Merge branch 'develop' into wrapping_revisions

Merge branch 'develop' into wrapping_revisions
Split off C++ material from wrapping lab.
Incorporated Ian's suggestions into the revision of the wrapping lab.
Merge pull request #686 from joshualy/wrapping_revisions

Wrapping revisions (C++)