v0.2.1

Changelog

Version 0.2.x

• Support for different searbird cnv pressure spellings ('prDM' and 'prdM')
  thanks @j08lue.

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.