TODOs for cleaning up the repository

[porst17]

It has to be discussed what makes sense and when we should do it. Better have a list then forgetting it.

• turn the main Kiosk functionality into an npm package that can be utilized by other Electron applications (like, e.g. the SNAPSHOT-Slider).
• separate the test app from the Kiosk browser
• clean up the index.html page - maybe join it with the test app
• separate the menu from the main.js file
• move the yargs parsing out of the apps ready event handler because certain Chrome options are set inside the handler even though they should be set beforehand (according to the Electron doc)
  • find a way to read the default settings before the ready event. The currently used package electron-settings only works after ready has been emitted, but then we couldn't use the defaults with yargs
• restructure the repository: currently everything is under images/kiosk due to its previous location in another repository