Backend lasertram migration

This release serves to document the complete migration of the backend of LaserTRAM-DB to using the lasertram package.

major changes

• backend migration to lasertram package: https://jlubbersgeo.github.io/lasertram/
• removal of LaserTRAM profiler
• Incorporation of "record and next" and "skip to next" button
• Better statistics output for calibration standard
• Incorporation of internal and external error on concentrations

minor changes

• changed up some fonts and colors
• added a loading spinner for when data are loaded into the dashboard so user better knows it's loading