Beef-up the docs.
Beef-up the docs.

Change-Id: I325c3b7a364567cc98e83380651124d701202cd9
Reviewed-by: Xizhi Zhu <6095b3dbb866d5a6b4a607e0cbd4aaa65e13c0b2@nokia.com>

qtproject/qtsystems,qtproject/qtsystems