closes#1807
- e2e tests now also cover the tax calculator.
- Dart app updated to match TS (it had no sales tax calculator).
- TS sample source cleanup (e.g. removed many unnecessary `docregions`).
- Prose updated to include @kwalrath's revisions from a while ago, Ward's comments, and
some of my edits as well.
Contributes to #1598 and #1508.
closes#485 and 479
removal all package.json from _example subdirs and add an example-config.json to each. Update add-example-symlinks to use new fns
updated gitignore, package.json
add tests to QuickStart
closes#483
A major refactoring of the intro chapters includes text revision
and the addition of "module" as an 8th "basic building block".
Incorporates John Papa feedback.