v0.3.0

This release adds several new features, first among them Python 3 support.

Changelog

• added calculation of pearson R confidence intervals based on fisher z transform
• ISMN reader can now get the data coverage for stations and networks
• ISMN interface can now be restricted to a list of networks
• added Python3 support
• moved grid functionality to pygeogrids package, pytesmo grids are deprecated
  and will be removed in future releases
• include triple collocation example and improve documentation see issue #24