Require authentication for protected actions

We first need some refactoring before select-layout/ can require authentication as well.
Fix: after reload, show that user is still logged in
Disenable input elements based on login status
Refactoring
Add new layout based on laser positioning

Coordinates come from document "141103 RFID antenne plaatsing opgemeten vandaag.xlsx".
Add basic automatic tag movement to simulator
Use ServerCommon.log
Let simulator use milliseconds in time stamps

This turned out to slow down location updates from simulated events to once a second.
Fix mistakes in measured antenna positions

Based on Stefan's e-mail from 3-Nov-2014, 22:37.