Fix drowser build using meique build system.

This requires the newer version of meique.

Reviewed by: Trust me.
Disable C++11 GNU extensions, Drowser doesn't use them.

Reviewed by: Trust me.
Implement GStreamer-based MediaStreamCenter

based on: https://github.com/Igalia/webkit/tree/webrtc

Signed-off-by: Nick Diego Yamane <nick.yamane@openbossa.org>
Split drowser's media player into player and backend implementations
wip stream player
wip
Cleanup and renaming some names to even more strange names :)

Signed-off-by: Nick Diego Yamane <nick.yamane@openbossa.org>