docs($http): clarify overriding of default transformations

Closes #8590
fix($compile): render nested transclusion at the root of a template

Closes #8914
Closes #8925
fix(ngSwitch): ensure correct iterator is passed to async function

Closes #8833
refact(ngSwitch): don't create extra function in for loop

Closes #8927
chore(docs): improve searching by member

The keywords processor now also extracts the members (i.e. method, properties
and events) into its own search term property. These are then used in the lunr
search index with higher weighting that normal keywords to push services that
contain the query term as a member higher up the search results.

Closes #7661