moved - put FockState in the .statelabelling package, becuase it makes
more sense.
moved - put FFT and DFT, as well as FunctionPlot and DensityPlot,
in a
.impl package.
bugfix - cleaned up some bugs in QFTSandbox, related to error sources
with changing sliders real time etc.
changed - minor change of how the wavepacket is initially set up in
BaseState.