initial frontend commit

to use:
install nodejs
navigate to LAPPS-frontend directory

in the console:
-> npm install
to run the server and see the page:
-> npm start
(http://localhost:8000/app/)
to create documentation:
-> npm run doc
to run karma tests:
->npm test
to run protractor e2e tests:
(IMPORTANT!!! start server first)
-> npm start
then in other console:
-> npm run protractor
Merge pull request #6 from learning-layers/initial_frontend

initial frontend commit