Issue #227: 3D - Create patterns (dismine/valentina)

New issue 227: 3D - Create patterns https://bitbucket.org/valentinateam/valentina/issue/227/3d-create-patterns

Susan Spencer:

Create patterns in 3D format.

Possibly use Wavefront .obj format. Recommend generating patterns using quadrangles. Recommend generating patterns so that edge vertices are aligned in pairs along seams so that seams can be ‘sewn’ together using Blender or other 3D stitching app.