Moving signature back to the top of api reference in guides.

Change-Id: I12a5b53e01527d3865e65b70c4a840af068832d7
Add hyperlinks to the summary tables

Change-Id: If7767c7ce1e01ed042557177dae471daff0f9393
Merge "Add hyperlinks to the summary tables"
Merge "Moving signature back to the top of api reference in guides."