Features
* SMURFS catches Control+c in terminal and dies graciously
* SMURFS creates dynamic fourier plots, including the possibility for markers (_-fm_ parameter)
Bugfixes
* Gap Ratio is only calculated when the whole dataset is used, i.e. _-trs_ is not set
* Nyquist frequency calculation is now fixed. Used to use the mean of the difference between two datapoints, now applies a histogram and uses the most common value.