Poly line collection

The PolyLineCollectionNode fills its vbo with PolyLineNode now, to support rendering any kind of vertex data available in the PolyLine.
Picking is updated to render individual picking IDs for vertices and edges.

See merge request !200

Move ci

Moved CI Scripts for OpenFlipper Free into OpenFlipper Subdirectory

See merge request !205

[skip ci]

[skip ci]

Move cmake

Move Cmake files into one subdirectory of the OpenFlipper directory

See merge request !204

Decresease the amount of allowed cppcheck errors

See merge request !203

fix several cppcheck warnings

See merge request !202

CameraNode

Draw CameraNode frustum as defined by the view and projection transform. Some functions are made obsolete and have no effect anymore: setNearPlane, setFarPlane, setSize. These settings have to be defined by the projection matrix instead. #81

See merge request !201