Don't want to error out on deprecated API warnings and such.
Just drop -Werror for the examples until someone updates them
to recent gtk3 API. Maybe showing the warnings will motivate
someone.
https://bugzilla.gnome.org/show_bug.cgi?id=796243
It is not needed and pulling it in is causing a link problem with msvc.
Including ges-internal.h sets the default debug category in assets.c to
_ges_debug. Because _ges_debug is marked as DATA in the libges.def, it
will only be linked from libges.dll if it is marked in the source with
dllimport. Instead of messing with that we can just remove this include.
https://bugzilla.gnome.org/show_bug.cgi?id=775295
