Finished work on proxies for meta models.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>
Attempted to simplify binding by making a short-hand
add-and-bind-primitive option when dropping onto canvases.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>
Merge branch 'master' of https://github.com/jakobehmsen/dynamake