WIP - Added terminal/text editor instructions in class 1. Moved boolean
expressions section to class 2. Added expected times, in class1
comments. Added "Let's develop it" slides to class 1 with activities.
Class 2 needs reorganization and just has boolean expressions slides
randomly dumped in there (WIP)
Improved order of class 2 by moving functions to the end. Improved
section on conditionals/predicates and used boolean expressions slides
originally in class 1. Added activities to do. Added slide about
indentation and one about scope from class 3.
Removed extra empty slide from index so that only the class links are
available
Improved some class 3 slides by adjusting wording or clarifying example
code
Made small corrects to class2 examples and wording
WIP - Added an assignment to class3. Made some minor clarifications.
Added expected times. Added TODO comments for remaining assignments
Put general purpose functions from books into helpers instead and
renamed them to be more general. Made books print a sorted list of
words
Fleshed out exercises 2 and 3 in class3
Improved comments in boilerplate.py to create a more thorough example
Clarified that the path environment variable in powershell is
Windows only
Removed some trailing whitespace in class3.html