Setup projectes for gstreamer-1.0 instead of gstreamermm.

Gstreamermm doesn't exist on Windows platform,
so it replaced on C-style gstreamer-1.0.
In this case update initialize class.
Setup projects for debugging MediaCore from MediaTests.
Replace std::wstring on Glib::ustring for media files.
Make basic using of gst for media files.

Doesn't test well.
Update projectes after eclipse update.
Fix create_empty_playlist test.
Add raw implementation of player.
Add test that just play one track.

Test doesn't check anything at the moment.