Minor revisions to pages 3 and 4.
Changed BlackJack section problems, added solutions
Revisions to page 2 of the wrapping lab.
Revisions to pages 4-7 of the wrapping lab.
Correct NumPy references and whitespace error
Merge branch 'develop' into Matplotlib
Fixed references withing the text, as well as spelling
Semantic fixes
A few brief grammatical edits
Edited writing and organization
Edited section 'Learning Python'
fixed some formatting and capitalization
replaced some lab text with external readings
made minor edits
revised as per suggestions
Merge branch 'develop' into wrapping_revisions

Merge branch 'develop' into wrapping_revisions
Clarification/grammar edits to linked list section
Split off C++ material from wrapping lab.
Incorporated Ian's suggestions into the revision of the wrapping lab.
Heaps: fixed root removal description, minor edits