Faster on Windows

improve the performance on windows
improve the Matlab code

parallel version will come in the next release

CurvatureFilter

ITK version is added
Python version is added
Separate filter and solver into two functions
All codes passed the test on Windows 8
The nonsplit fashion is almost as fast as split fashion on Windows 8 with MSVC compiler

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(More filters will be added in next release)
(parallel version will be added in the next release)

curvature filter

The generic filter solver for variational models is added.

curvature filter

Add matlab code;
Add Bernstein Filter;
Add Multiscale scheme;

curvature filters

Gaussian curvature filter
Mean curvature filter
Total Variation filter
Bernstein Filter (minimize mean curvature without Euler scheme, therefore, more efficient and with less numerical error)
Matlab code for GCF and MCF