PEP8 compliance
add set_loglevel()
cleanup unused stuff, add docstrings
docstring conventions and ws changes
move Filament class to volpy, adjust testscript
rename testscript after moving the class code
use log module, add docstrings
unpack arguments explicitly for code-readability
move output-writing to separate function
replace Filament class with more generic Points3D class

* Points3D implements EDM and maximum distance pair methods
* Filaments class should be specialized to operate on a Points3D object