Web-app: added script for stress testing attendance
Inserts about 40 000 attendance records on each run
Schema: fixed token table
Web-app: simplified getter
Prototype facial recognition using openCV
Android: fixed entity
Android: fixed logout button in web activity
Web-app: don't fail on curl uploads
Face-rec: resize and convert images to grayscale for storage
Face-rec: improved processing speed
Face-rec: improved processing speed more