Fix snapping points to GAUL borders when rounding error takes the point slightly outside of the border.
Ensure QC fails if any location GAUL codes are missing.
Upgrade JTS to latest version throughout source code.
Fix tests and checkstyle
Ensure that the snapper fails gracefully if the closest point cannot be found due to rounding.
Merge pull request #145 from SEEG-Oxford/snapper-fixes

Fix rounding error in snapper