Fixes a couple issues with the column checking.
Adds verification to table columns to make sure table format is correct.
Cleans up the node processing.
Adds a loading progress status.
Adjusts the SQL import files to not destroy previously imported data.
Updated README.md to reflect the changes for SQL importing.
Fixes#5485Fixes#5477
Thanks to @Lemongrass3110!
Co-authored-by: Lemongrass3110 <lemongrass@kstp.at>