Add more messages to debug log

[szszszsz]

More OS specific data:

• lsb_release -a
• dmesg | tail -10
• free -m
• md5sum /etc/udev/rules.d/40-nitrokey.rules
• ls -l /dev/nitro*
• export or values of XDG_CURRENT_DESKTOP, QT_QPA_PLATFORMTHEME and SESSIONTYPE at least
• Qt version installed on system
• messages sent to tray (like Nitrokey connected, check solution in #70 )

Also:

• stick FW version (if not added already)
• app version (possibly git commit sha)
• add timestamp

[szszszsz]

• Is the Nitrokey connected to USB 2.0 or USB 3.0 port?
• USB controller: "lsusb" and "lsusb -t"
• Linux distribution: "cat /etc/lsb-release"
• Linux kernel version: "uname -r"
• Processor architecture (32 or 64 bit?): "uname -m"
• GnuPG version: "gpg --version".
• ./nitrokey-app --cmd prodinfo | grep -v ID