PPSD: enable getting/plotting mode and mean psd values
Update outdated matplotlib URIs.
Update NumPy website.
Update official Python URIs.
Update SciPy links.
Update IRIS hosted URIs.
Update geopy URI.
Make PyPI links HTTPS.
Fix links to source files.
Update URIs that are redirecting.
Update URIs that are now 404.
add missing symbol curr_file to .def file
More resilient StationXML parser.

It now pops a warning when it cannot convert some string to a float or
the float is a NaN. It does not stop parsing anymore. This is
unfortunately needed for some real data out there.
Don't install suds-jurko on Travis.

It doesn't appear that the NERIES client is tested on Travis, so this
import is not needed.
Pin NumPy and SciPy to versions in the wheelhouse.

Matplotlib 1.3.1 and NumPy 1.9.0 are incompatible (so it surprises me
that they'll both install), and cause test failures.
Don't install M2Crypto on Travis.

It's used by Arclink, but not tested.
Add M2Crypto to EXTRA_REQUIRES.

Not sure why it hasn't been mentioned before.
Remove extra parentheses in print function calls.
Bump NumPy version to match wheelhouse.
Merge pull request #884 from QuLogic/doc-linkcheck

Update doc links