Refactor (fixes #12)

[jonaskello]

This is a highly opinionated refactoring of the example. Please feel free to close instead of merging. It really has too many changes to be considered a proper PR. However I think it might demonstrate some simplifications and improvements that could be made:

• Remove redux-saga (fixes #12)
• Less folder hierarchy (putting each component in it's own folder is good for large apps, but obscures this small example)
• Simplify babel config
• Cleanup dependencies (some dev deps was real deps, some were not used etc.)
• Use prettier code-style

[jonaskello]

I use prettier code style and it has double quotes by default. Actually I have a prettier plug-in that formats all code I save automatically so I was not really aware that I reformatted the code :-).

Babel should still be there, I just simplified it a bit by using the babel-env preset.

[maxmantz]

Wow, thank you very much @jonaskello ! This is a great way of simplifying the structure of the app. I hope this will make things easier to understand.