Added Cookbook examples
Added 2 examples to cookbook.
- creating a list of
tg::trianglesand adding them to a fresh mesh
- extracting edges from an existing mesh and adding it to a vector of segments
question: add images and complementing add/get methods, i.e. add eges and get faces for completeness sake. mostly similar though
note: pls gib developer access, ich kann sonst kein assignee festlegen :)