First stable release
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- changes API including the class name from `ndsharray` to `NdShArray`
- added unit tests
- added documentation on readthedocs
- it is now possible to change shape/dimension/dtype of a numpy array after creation of the ndsharray instance: this will lead to a silently re-creation of the shared memory using mmap. a re-creation can be checked with the property `ndarray_mmap_name`