Blender Git Loki

Made sure lattice and curve springs are calculated based on the original
(Non deformed) lenghts. Code for lattice (by Jens Ole) was already there
btw, was replaced accidentally by Daniel during his modifier craze :)

ALso added comments in code to clarify the softbody initialize flow, which
happens in 2 stages now. Goal weights and springs are read from the
original data, the vertex coordinates from the modifier data.