PPSD: enable getting/plotting mode and mean psd values
Added hotfix for linking to anchors
Improved speed of classicSTALTAPy method
Improved conversion to float
Fixed missing "self"
Fixed pass value
Avoid builtin name
Avoid using builtin "sum" as variable name
Use np.fromfile to drop struct import.
Add support for little-endian CSS files.

Test files were produced using the 'endi' program from MINEOS on the
existing big-endian file.
Untested support for CSS files in ASCII.

These data encodings are defined on page 33 of the CSS reference schema,
but it's not clear if there are any separators between each value. I
also do not have any samples files, so this bit remains untested. Maybe
someone will provide an example some time.

The reference schema can be found in the Pisces repository:
https://github.com/jkmacc-LANL/pisces/tree/dev/docs/data
Fix CSS on Python2.
ChangeLog CSS additions.
seishub client: helper method to request a Catalog object from a seishub
server of version 1.4.0 or higher
seishub client: avoid converting resource_name to numeric data types
minor adaptions to seishub client to match new quakeml based seishub
server (does not affect old code significantly)
Fixed indentation (flake8)
Flake8
Fixed missing self
Flake8