Adding initial window and scene

Signed-off-by: Rodrigo Goncalves de Oliveira <rodrigo@thecoreme.org>
Adding build system (qmake)

Will add cmake support and, probably, deprecate qmake soon (because
reasons)

Signed-off-by: Rodrigo Goncalves de Oliveira <rodrigo@thecoreme.org>
Adding build system (cmake)

Propably, soon will keep just this and deprecate qmake

Signed-off-by: Rodrigo Goncalves de Oliveira <rodrigo@thecoreme.org>