chore(docs-assets): add versions to paths for imported assets

This should prevent stale caches in browsers if we upgrade any of these
assets.
docs(tutorial): add missing @step tags

Since steps 9 and 11 were missing @step tags they were out of order

Closes #6292
Closes #6291
docs(bike-shed-migration): convert doctype and names

To keep the same logic as the commit https://github.com/angular/angular.js/commit/2e641ac49f121a6e2cc70bd3879930b44a8a7710
docs(guide/concepts): clarify wording
chore(docs): fix broken example tabs
docs(tutorial/step-11): add controller to correct object
chore(docs): cope with trailing slash and "index" in URLs

Closes #6295
docs($interpolate): correct small typo
docs(guide/compiler): remove innacurate statement

The $compile service accepts string as a value and wraps it if
needed, so this statement isn't correct, at least by the source
code.

Closes #6301
test(docs): add check for resilience to trailing slashes, etc.
docs($q): fixup dgeni ngdoc annotations for $q methods

Just a tiny fixup, that's all.

Closes #6317
style: remove ws and enfore no-trailing-ws jscs rule
docs(ngClass): Explain all 3 ways how to use ngClass

Closes #6324.
fix(jqLite): make jqLite('<iframe src="someurl">').contents() return iframe document, as in jQuery

This is a very tiny change to make behaviour consistent with jQuery.

Closes #6320
Closes #6323
style(jqLite): remove trailing whitespace in new test

Oops.
chore(travis): don't run Travis-CI builds for G3 branches

Building the G3 commits occupies a lot of time, and these branches have
already been tested.

Closes #6328
docs(guide/providers): fix example snippet

Closes #6331
Closes #6332
docs(triaging): remove reference to the obsolete chrome extension
docs(contributing): remove reference to the obsolete chrome extension
docs($routeProvider): fix indentation

Closes #6345

Somebody accidentally padded a list with one-too-many indentations, which caused the actual documentation page to render incorrectly. This should fix it.