1.6.2.1 Release

Added auto update message.

Updated the icon mapping, so when custom icons are chosen through control panel they display properly.

Fixed the Value issue with the update spinner

Added a write/read lock on the config settings to hopefully improve the configuration settings issues.

Updated the icon images so they aren't a weird 8 bit colour version.
Merge branch 'master' of https://github.com/xenolightning/AudioSwitcher_v1.git