Made some new nodes but also have Iron changes


#1

@lubos I’ve submitted a PR to armory and iron to add

AddImpulseAtLocation
GetVelocity (@Simonrazer this one I know you asked about)
VectorClampToSize

And added a Get Length option to the Vector Math node

Hope they are OK.


I stupidly did them as a single PR :frowning:


#2

Thanks again! Now merged.