Fix typo error on Eaton / MGE USB-RJ45 cable
Fix USB permission issues related to Linux / udev

Rename udev rules file to 62-nut-usbups.rules, to prevent NUT USB
privileges from being overwritten

Closes #140
Distribute FreeDesktop AppData file for NUT Monitor

FreeDesktop AppData file for NUT Monitor was not distributed, waiting
for some approval
Fix typo error

Fix a typo error on "-B" option (reported by Evgeny 'Jim' Klimov)