v1.7.0a

Release 1.7.0a

• A new indexing algorithm has been integrated (:func:index_pink), which is particularly well-suited to serial pink-beam X-ray and electron diffraction indexing (#19). This algorithm is notoriously hard to test; if you find any issues, feel free to raise an issue <https://github.com/LaurentRDC/crystals/issues/new>_ on GitHub