Fix doc versioning in headers

Instead of showing "Qt 1.0" in the header use "Enginio 1.0"

Change-Id: I79bdab5a1753e99dfe5645c50823b82be83600be
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Make qml create and query documentation visible again

qdoc doesn't manage to link to Enginio::Operation from within
the Enginio qml module. Rather than not having the docs for these
functions at all have broken links to Operation.

Change-Id: I7e1062eea567b01cd3a3c9c358a615cf770b28d3
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>