Read a public key as QR-code from the charging station display and maybe store it

[ahzf]

• ChargePoint shows the public key as QR-code on the charging station.
• It would be useful if a customer could store this public key (+meta data) for later reference.

[ahzf]

Sometimes the end-of-line character(s) are missing when I read a chargepoint public key from a QR-code. This might confuse the current PEM reader and will need a fix for it.