Reciprocalspaceship

- 58 Add methods for converting between wavelength and energy
- 60 Add stats module for computing redundancy of observed reflections and completeness
- 62 Change internals for float32-backed dtypes to improve performance

- 51 Update `rs.read_precognition()` API
- 50 Add `rs.read_crystfel()` to support crystfel stream files
- 53, 55 Documentation and error handling updates

- 49 Add MIT License to PyPI releases

- 40 Add `rs.read_csv()` to support plain text input sources to `DataSet`
- 42 Update supported Pandas versions
- 44 Add merging example to documentation using PyTorch to assess error models
- 45, 46, 48 Improve French-Wilson scaling algorithm and testing to assess accuracy
- 47 Add `DataSet.centrics` and `DataSet.acentrics` accessors

- 30 Add `rs.algorithms.merge()` for inverse-variance weighted merging of observed intensities
- 35 Add `rs.io.write_ccp4_map()` for writing CCP4 map files from 3D NumPy arrays