update sphinx documentation (#31)

docs/CMakeLists.txt

docs/api/ALL.rst

docs/api/ALL_Point.rst

docs/api/ALL_module.rst

docs/api/CustomExceptions.rst

docs/api/index.rst

docs/classes/ALL.rst

docs/classes/ALL_Functions.rst

docs/classes/ALL_Histogram.rst

docs/classes/ALL_LB.rst

docs/classes/ALL_Point.rst

docs/classes/ALL_Staggered.rst

docs/classes/ALL_Tensor.rst

docs/classes/ALL_Voronoi.rst

docs/conf.py.in

docs/full/complete.rst

docs/index.rst