fix up templates for lab to ensure that they work smoothly and contain no traps
start week 5 presentation
 * add in answer files for the two in-class labs
 * add answer for week 4 homework
Steps for forking and generating pull requests.
remove dan's original source
add assignment help page
add assignment help page to main index toc
images for week 5 presi
 * update index, emphasize required assignments and attendance in the assessment portion
 * update outline with full week 05 reading.
 * update week04 presentation with Dan's suggestions
 * push forward on week 05 presentation
 * include notes from the homework in week 4 slides
 * add a tool to create exertped code samples
 * make an exertped code sample file for this week.
remove initial spaces to improve the cut-and-pastability of the samples
add notes on type-along.txt
Merge remote-tracking branch 'upstream/master'
 * add css rules for invisible tables
 * push into flask intro slides
Merge remote-tracking branch 'upstream/master'
Finished draft of bookdb WSGI script.