Splitting the utils file into multiple files:

- api: Contains all methods for API requests. This includes requests
against the AWS and Google API and requests against the Kubernetes API
server.

- constants: Contains now also the keys for items whiche are saved into
the localStorage.

- storage: Contains all operations whiche are executed against
localStorage.

- helpers: Contains all other helper functions.

Instead of get and set we are using read and save for the functions for
localStorage, because some of the function names are also used for API
functions.

Add more comments to the context component and enable the tslint rule
for max line length.