some unfinished stuff related to 2d model
Merge branch 'trikSupportStage2-2dModel' of https://github.com/qreal/qreal into trikSupportStage2
two 2d models, for v4 and v6 versions
Merge branch 'trikSupportStage2' of https://github.com/qreal/qreal into trikSupportStage2