SFS-Python 0.5.0

https://pypi.python.org/pypi/sfs/0.5.0

• Switching to separate sfs.plot2d and sfs.plot3d for plotting functions
• Move sfs.util.displacement() to sfs.fd.displacement()
• Switch to keyword only arguments
• New default driving function for sfs.fd.wfs.point_25d()
• New driving function syntax, e.g. sfs.fd.wfs.point_25d()
• Example for the sound field of a pulsating sphere
• Add time domain NFC-HOA driving functions sfs.td.nfchoa
• sfs.fd.synthesize(), sfs.td.synthesize() for soundfield superposition
• Change sfs.mono to sfs.fd and sfs.time to sfs.td
• Move source selection helpers to sfs.util
• Use sfs.default object instead of sfs.defs submodule
• Drop support for legacy Python 2.7