-------
Documentation update!
+ Includes significantly more documentation for how to create initial conditions
files with `swiftsimio`.
+ Minor bugfixes throughout.
+ Added `swiftsimio.validate_file` to validate your dataset is a SWIFT output
file before reading.
+ Added a number of metadata properties to the reader for pretty-printing code
information: `compiler_info`, `library_info`, `hydro_info`, `viscosity_info`,
`code_info`
+ Added ability to automatically generate smoothing lengths for gas datasets
in the writer.