v2.1-dev

Updates from 2.0:

• Cross section creation supported with HVSRBatch or list of HVSRData (or dir with .hvsr files) (sprit.plot_cross_section)
• Table report specifically for batch outputs that mirrors inputs but with results
• Calibration module working with updates HVSRData objects
• Add update_elevation function to update all attributes associated with elevation
• Add/move plot_depth_curve to sprit_plot module
• fix to _init_peaks() (part of sprit.check_peaks()) so that small peaks are initialized
• Various minor fixes to batch runs

Full Changelog: v2.0...v2.1-dev