for label width to assist cutycapt slide capture
added image background for main heading slides, cleaned up ttoy samples for clarity
clarity for early examples and string distance
examples for e-app-eval and e-arg-eval
clarification on ast
formatting, tweaks
there is no earthly reason why I should have a picture of godzilla for the background of the considerations heading slide ... but I don't care
ignore slide image output, tweaks, and additions