Changelog
---------

Version 0.2.2

* Support for different searbird `cnv` pressure spellings ('prDM' and 'prdM')
  thanks @j08lue.
* Lazy import for optinal dependencies (`gsw` and `scipy`).
* Several small bug fixes

Version 0.2.1

* None is assigned to position data when it is not available.

Version 0.2.0

* Fixed compatibility fir 0.13.

Version 0.1.0

* First version derived from oceans package.
