Changed BlackJack section problems, added solutions
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
fixed while loop example
fixed some last small things.
Merge branch 'develop' into Matplotlib
Grammatical edits, replaced unnecessary tables with links to documentation
revised everything except matrix problems
all revisions finished except a figure
Changed the bst removal problem
Merge pull request #695 from aamcbee/NewDataStructures

Changed the bst removal problem