move naming from mesh->asset
add image mode to camera
meshSource -> assetSource
alignment with up vector
first work on ortho camera
Images now loaded with correct units and size
thumbnail support
proof of concept for PIP
auto setting of image mode (needs work)
Merge branch 'image' into ortho
3 separate cameras, ortho, per, othozoom
Merge branch 'pip' into othopip
PIP enabled and tracking mouse
fix for selection methods, target on pip