added credentials placeholder for front-end
added example files for credentials and config
fixed the front-end steps rollout with the popup method
fixed popup call withs state, and fixed authenticate call with right code
started writing the tutorial in the README.md file
removed test keys from the repo
added step-1 part in README.md
fixed checkout command at the end of step 1 in README.md
added tutorial to step 5
added tutorial to step 6 + changed credentials.example.js to be clearer
added tutorial to step 7
removed popup code from prepared code in front-end
continued tutorial step 7
added step 8 of the tutorial
finished tutorial in README.md
corrected startup code