SAPUI5: remove "completed todos" count

As per request in https://github.com/tastejs/todomvc/issues/1234

dont lint the same example a bunch of times

No big deals but makes sense with the new CI in place

Fix #1324

Ref #1234

SAPUI5: fix adding new tasks, remove browser-dependent autoselect

The return value of Array.push() was expected to be the resulting array,
but it is the length of the array. Not sure how this ever worked, maybe
Array.push() had been overridden wrongly somewhere.

The browser detection API conflicted with TodoMVC's code checks and is
anyway undesired.

Also update the URL from which SAPUI5 is loaded:
sapui5.hana.ondemand.com is the one to use and is powered by Akamai CDN.

Fixes https://github.com/tastejs/todomvc/issues/1315

Fix #1317

Some readme edits

Many file paths were outdated since we moved around all examples.

For consistency

There was a link to one article instead of the whole site. Kinda sad as the whole site is awesome :)

Ref #1234

Angular: update `package.json`

We need it to run the app so it isn't a dev dependency.

Angular dart Updates

webrx fixes

Fixes #1293

Fixed in:
https://github.com/WebRxJS/WebRx/commit/712c8e820da2660ea816714901c20bd97a4284f4

Fix passing tests

Fixes #1289

Grammar suggestions

Here, "however" is used as an aside and should include commas.

adjective => adverb

contributing.md: add note about app breakage

This makes JSCS pass on the ember app

Makes JSCS and JSHint pass on `firebase-angular` app

Fix #1203

test work!