<feat>: add connection between WAMS and location-server to synchronize users.

The location-server now uses artifact- and user-information from WAMS. Artifacts are dynamically
added and removed to/from the location-server whenever they connect or disconnect from WAMS.

<feat>: add method to set properties of Socket.IO in WAMS

This method allows the server to modify the behavior of Socket.IO (e.g., debug level).

<refactor>: rename locationServer.js to locator.js to fit naming convention