Bower not used anymore

The Helfertool repository now (again) contains all JS and CSS dependencies. This means that npm and bower are no dependency anymore, this should make deployment easier and save around 50MB of disk space.

This means that the node_modules and helfertool/components directories can be removed. It is recommended to run python manage.py collectstatic --clear to remove the old files from the static files directory that is served by the web server.

New documentation

The documentation is now published on https://docs.helfertool.org/.

It contains a section about the deployment of Helfertool that is more detailed than the previous README file. The README now only contains the instructions to setup a development environment.

Some parts are still missing, but the important information should be there. Feel free to create an issue or pull request with improvements!