Fix error in error message
Merge pull request #9 from kickapoo/master

Fix error in error message
Merge branch 'master' of github.com:openmeteo/pthelma
More Mac OS X fixes
Allow albedo to change through the year (fixes #6)
Minor seasonal albedo improvements (additional fixes to #6)

Improved and completed the documentation, fixed some comments and some
error messages, simplified and beautified some parts of the code.
Have bitia put timestamp in output filename

This reverts the most important change of 2cbbbf8.
gerarda: Use timestamp in filename
Fix PEP8 and other trivial issues
Fix error in usage of np.vectorize (fixes #10)
Minor reorganization of documentation files

I put user documentation in a different directory than developer
documentation. This makes it possible for a user application to have the
same name as a python module.
Rename pond to enhydris_cache
Rename fordonia to aggregate
Rename bitia to spatialize
Rename gerarda to vaporize
Fix filename: "spatilize" -> "spatialize"
Recalculate output when there is more data (fixes #7)
CLI applications in alphabetical order in docs

When the CLI applications were renamed, we had failed to reorder their
list in the documentation.
Document SoilWaterBalance class (not yet written)
Add pthelma.SoilWaterBalance class