This commit includes config files for the frontend, proxy, CLE and nginx
and some additional scripts to automatically set-up the config files.
The current features include:

* A bash script called running_mode to switch between offline full local
  mode (no oidc) and EPFL mode using the dev. servers (with oidc), and
  local mode with collab support services mode (oidc w/ local backend).

* A bash script called configure_nrp that sets up the frontend
  config.json, the CLE config.ini and the gzbridge and gzserver files.
  This is especially helpful when installing the platform from scratch.

* A bash script called clone-all-repos that clones all necessary repos
  to install the NRP locally to the $HBP directory.

* A bash script called purge that deletes all existing configuration
  files from the Frontend, CLE and Proxy repos, as well as the nginx
  config files and the gzserver/gzbridge scripts.

* A file called nrp_variables including all necessary enviornment
  va...