Added skinning to package.

Author: joemarch01

setup.py

@@ -2,7 +2,7 @@
 
 setup(
    name='NiLBS',
-   version='0.5.6',
+   version='0.5.7',
    description='NiLBS 3D implementation.',
    author='Joe March',
    author_email='jgm45@cam.ac.uk',
@@ -14,6 +14,7 @@
              'NiLBS.occupancy.voxel',
              'NiLBS.pose',
              'NiLBS.sampling',
+             'NiLBS.skinning',
              'NiLBS.weighting'],
    package_data={'NiLBS': ['data/*.npz']},
    install_requires=['trimesh', 'pyrender', 'tensorflow'], #external packages as dependencies