add data and readme.md

Author: JiaxiangZheng

README.md

@@ -1,6 +1,13 @@
 DeformationGraph
 ================
-#NOT IMPLEMENTED COMPLETELY YET!!!#
 
-A implemetation of deformation graph which was widely used in mesh deformation and non-rigid reconstruction
+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](http://eigen.tuxfamily.org), [FLANN](http://www.cs.ubc.ca/~mariusm/index.php/FLANN/FLANN) and [PCL](http://www.pointclouds.org/) 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.
+