Rename docker image to villas-backend in docker-compose.yml

Add user id to visualizations

Fix user authentication decoding

Remove much unneeded meta data in logger, thus making the log output
much more usefull

Remove log file in development mode

Feature change simulator connection

See merge request !7

Merge branch 'feature-change-simulator-connection' of git.rwth-aachen.de:VILLASframework/VILLASweb-backend into feature-change-simulator-connection

Fix mongoose connection opening

Closes #17

See merge request !6

Resolve "Add log level config option"

Closes #6, #7, #10, #14, and #15

See merge request !5

Fix mongoose promise library deprecation

Fix file log level
Add and improve log messages
Change mongoose logging to debug log level

Change development to verbose output

Image widget fix

See merge request !3

Users update

See merge request !2