Add API search support to dotnetstatus site

[conniey]

From @dsplaisted on November 5, 2015 19:55

Right now there is a "search" box with autocomplete. If you type (or use autocomplete to get) the full name of the API, then you can navigate to the page for that API. But there's no search results page and no way to search using a partial name.

We should:

• Add a search results page
• Support searching for partial names
• Show types in the search results in addition to members

Copied from original issue: microsoft/dotnet-apiport#181

[rschiefer]

I support this change.