Added basic layering functionality including adding, removing, showing and hiding of layers and layer groups
Added field objects and scaling back into vision window
Added dynamic resizing
Split up the vision object layers and converted to the new line format for horizons
Fix the drawing of the horizon
Added clear method to layeredcanvas manager
Added partial support in classifier for larger images
Split the classified iamge into normal and refined
Added 'all' option to vision window
Added more support for larger images in the classifier
Merge branch 'feature/Layers' into develop