DeformationGraph

A implemetation of deformation graph which was widely used in mesh deformation and non-rigid reconstruction. I write this for the reason that I will use it in later animation reconstruction work.

##about the code## Eigen, FLANN and PCL are used as third party library.

DeformGraph.h and DeformGraph.cpp contains the core code of deformation graph, and DeformGraphTest.cpp is an example for how to use the code. It should be note that the initial data should be aligned together and normalized.