* Unified code base for python 2 and 3, we no longer use 2to3 to convert.
3.3.2
* Fixed py3k bug that prevent installation.
3.3.1
* Both `gpan` and `bfrq` accepts 3D arrays now. * Fixed inconsistency in use of ITS-90 and increased convergence precision from 1e-4 to 1e-10 for `cndr`. Note: Not sure if this fix is needed. However, it is in the original version!
3.2
* Corrected sign of potential vorticity in `bfrq`.
3.1
* Added `swvel` to compute surface wave velocity.
3.0
* Converted code so that temperature is now ITS-90 throughout.