[DOC] Reformat README.md

Remove backticks from links. Reformat and reword How to Run Unit Tests section.
[BUGFIX beta] SVG support for metal-views

This greatly improves SVG support in metal-view by basing the current
namespace off the contextual element. SVG components like {{somePath
should be viable with this change.
[BUGFIX beta] Use domHelper for setting attributes, allows camelCase attrs
Fixes classNameBindings regression

`classNameBindings` was initialized as an empty array inside `propertiesFromHTMLOptions`
so we could maintain the same shape of the object via this
[PR](https://github.com/emberjs/ember.js/pull/5559).

When the view is [created](https://github.com/emberjs/ember.js/blob/master/packages/ember-views/lib/views/states/in_buffer.js#L38), `options.classNameBindings` is an empty array
and the view gets confused about its classes.

Scumbag @twokul.

Fixes #5660
Merge pull request #5666 from twokul/class-name-bindings

Fixes classNameBindings regression
[DOC] make run.later return val consistent with other run methods
Merge pull request #5675 from carpeliam/master

make run.later return val consistent with other run methods
Merge pull request #5654 from mixonic/metal-views-namespaces

[BUGFIX beta] SVG support for metal-views
[BUGFIX beta] Update backburner.

Compare view:
https://github.com/ebryn/backburner.js/compare/a7dcf586bc840021d7a585eabf9fd631d76c0c35...24ff580bef0f2d402474cc3d221da73ac82f09c9
Merge pull request #5676 from rwjblue/update-backburner

[BUGFIX beta] Update backburner.
cleanup
[Bugfix beta] map.has where map.length === 0 should return false not undefined.
[BUGFIX beta] Update backburner.

Compare view:
https://github.com/ebryn/backburner.js/compare/a7dcf586bc840021d7a585eabf9fd631d76c0c35...24ff580bef0f2d402474cc3d221da73ac82f09c9
Extract DAG.js
[Bugfix beta] don’t leak `-0` as a key

* some tests for NaN support
fix testing redirect to http://localhost:4200/ redirects to http://localhost:4200/tests/ for easy test access
Merge pull request #9261 from stefanpenner/more-map

More map stuff
Merge pull request #5663 from stefanpenner/fix-redirect

fix testing redirect to http://localhost:4200/ redirects to http://local...
Correct test link URL
Merge pull request #5659 from concreted/patch-2

[DOC] Reformat README.md