Currently, when visiting a page with a relative link e.g. https://angular.io/docs/ts/latest/guide/testing.html#!#top, `NgIoUtil.getExampleName` fails to match the example name. This results on `live-example` directives on that page missing the example name in the link: instead of linking to https://angular.io/resources/live-examples/testing/ts/plnkr.html it will link to https://angular.io/resources/live-examples//ts/plnkr.html (notice the missing `testing` and the double slashes).
closes #2005
closes #1818 Previously, the markdown of some chapters was converted to Jade markup to support the conditional exclusion of TS prose parts in Dart chapters. This commit reverts some of that back to clean markdown, thanks to a few custom directives.