Fix CLI application rename remnants

pthelma.iss contained some obsolete references to "pond" and "fordonia",
which were changed to "enhydris_cache" and "aggregate".
Rename spatialize number_of_output_files parameter

The parameter was number_of_output_files in the documentation, but
number_of_files in the code. Changed to the more precise
number_of_output_files.
Merge branch 'master' into 0.10
Version 0.10a9