Telemetry, Custom Output and some design changes

Added light telemetry which is optional.

Data which gets transmitted:

● UUID (randomly generate identifier, nothing personalized)
● Current timestamp (to evaluate how frequent the software is used)
● If the software is running or not (this is transmitted on startup / shutdown of the software, no service running in the background!)
● Current software version

Custom Output:

In the settings window there is a new textbox in which you can set a custom output format.
Format is like this:
Pendulum - Tarantula - Original Mix
^ {artist} ^ {title} ^ {extra}

Kepp in mind that this can and probably will lead to weird text sometimes when the artist or the song has extra dashes (-) in the name!