Pyclesperanto

First release

This is a pre-alpha release. Functionality are kept to minimum.

See https://github.com/clEsperanto/pyclesperanto_prototype/blob/master/docs/release_notes.md

New features
* The [documentation](https://pypi.org/project/pyclesperanto-prototype/) now has a small example gallery

Bugfixes
* Underlying OpenCL code was sychronized with [CLIJ2 2.2.0.11](https://github.com/clij/clij2/releases/tag/2.2.0.11)
* This fixes an issue where the first pixel in the images was changed to background when running Connected Component Labeling
* This also fixes non_equal and equal which were not functional in 3D

New features
* `cle.available_device_names` function which informs about found/installed OpenCL devices

Bug fixes
* Connected component labeling box/diamond gave the same number to multiple objects
* Bugfix in histogram generation on NVidia GPUs. Histograms should now be more similar to those generated in scikit-image `expose`. Histogram bins are now correctly centered.

Miscellaneous
* Added a lot of examples on the website

Initial pre-release. The complete reference can be found here:
https://github.com/clij/clij2-docs/blob/d19589e6db9dc9720f34756909c6c86fb8e02196/reference__pyclesperanto.md

See also:
https://pypi.org/project/pyclesperanto-prototype/