points coordinates constiency check

Summary

Adds a consistency check which ensures that point coordinates actually match the grid definition.

Related Issues

• Closes #279 (closed)

Checklist

• All code changes are covered by unit tests
• Code coverage did not deteriorate
• Code follows Style Guide
• Documentation updated, if necessary
• WIP: Manual running of configure/build jobs was successful
• Update changelog, if changes are worth mentioning (Develop section in doc/src/changelog.dox, add section if not yet included)