Initial porting effort to GStreamer 1.0.

Imported from git@github.com:jhodapp/qtmultimedia.git

Contributions from:
Ilya Smelykh <ilya@videoexpertsgroup.com>
Jim Hodapp <jim.hodapp@canonical.com>
Sergio Schvezov <sergio.schvezov@canonical.com>

Change-Id: I10fa5e5078efa4564ce833befd417008e26a90a9
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>