Segregate Large Time Series into Shock or Vibration Portions, then Run PVSS or PSD for Each

[S-Hanly]

Inspired from this article that recommends taking a large time series and segregating into either shock or vibration periods via a skyline approach identified with either:

• RMS
• Kurtosis
• Peak
  

Then compute a waterfall plot (line for each segment) for the various shock and vibration profiles.

1642883.pdf

Note that this would automate what many enDAQ customers are looking to do:

• From a large time series
• Define a SRS to represent the environment
• Define a PSD to represent the environment
• Understand the consistency of above environments (remove outliers for example)

[pscheidler]

Discussed in meeting: this will be a separate function from PVSS, but the output can be fed into PVSS for processing

[pscheidler]

related: #169 to pull out shock values