Gate Jump

This switches over to using the Laravel PHP framework to do the heavy lifting. It's not a complete change, but does require the database to be re-imported.

From a user perspective, the only change will be that they can not edit items that they have not added to their character, and any changes may be removed if they remove them from their character. Also, while not mentioned in the changelog (oversight), the save file won't contain a complete copy of the database, so should be much smaller.

NOTE: This is a re-release. This originally did not build a running Docker container. Due to some legacy code treating versions as floats, we can't just delete the bad tag and add a point release.