Update TroopJS to latest 3.0.x and new template.

xrefs #1491 #1218 #1215

Add a new framework: GopherJS + Humble

angularjs: simplify clearCompleted method

* Remove unused `completeTodos` variable
* use `Array#filter` instead of `Array#forEach`

correct actual vs. expected order in assertions

See https://nodejs.org/api/assert.html. The "actual" value should come
first, and the expected value should come second. This ordering is
important in order for the output describing a failed test to be
correct/accurate.

Angular: add missing semicolons

Fix typo "reduntant" to "redundant".

docs: Adjust minor grammar and punctuation issues

Close #1457

Sjs/improve memory tests

Make todo-list XPath more permissive

* Gives us a bit more flex around some frameworks

improve riotjs example

remove unnecessary update()

update Vue.js to 1.0.0

React: Remove direct DOM manipulation

Fix #1488

Turn the `<input>` into a
[Controlled Component](https://facebook.github.io/react/docs/forms.html#controlled-components)
and avoid fiddling with the DOM in an imperative way.

Fixed links for TypeScript issues/documentation.