Beta Update 1

Numerous fixes and improvements:

Fixes

• Bug when plotting nonuniform sample rates
• Bug in UI for some plotting options
• Replaced many ragged arrays with lists
  • Fixed a numpy depreciation error
• Fixed a bug with the SEID error contribution table
• Upgraded pillow dependency to mitigate vulnerability
• Downgraded pyside2 requirement to facilitate install via anaconda
• General bug fixes

Improvements

• Improved SITMUF decomposition failure warning
• Improved visuals for plots with inherited/nonuniform sample times
• Complete overhaul of trapSum function
  • Improved speed and accuracy
  • Improved performance with nonuniform sample times
• Faster SEID calculations
• Improved calculation progress feedback
• Vectorized error propagation for improved speed
• Added new datasets
• Added exercises
• Improved error selection behavior
• Reduced math ops from double precision to single precision
  • Save on memory for large number of iterations
  • Can cause overflow in rare situations with large material balance terms