revert icon state to it's original setup; icons go into public folder

fix the former exposure of the auth token and create a new branch therefore

related #83

implement unit tests with jest. configure it to match our specific needs. atm no icons can be imported and have therefor been commented out in the component to be tested

#66

change label from 'date' to 'year' since it seems to be more descriptive. thank you for pointing this out, Mani

update pkgs. extend panel config. rewrite toggle mechanism and event emitters. fix stylings for the panels

codecleaning: delete obsoltes; uninstall obsolete dev-dependencies; implement routing base; bugfix: content threw parse-error regarding nested promises

delete obsolete files remaning from setup; bugfix togglebar; install nodemon as dev-dep; extend script in package.json

install openseadragon; provide webpack alias '@'; copy projectfiles from emo; adjust routing; insert quasar components