Ensure uid3 is lowercase in templates. Also fix some bugs related to validating UID3. If the user enters a non-0x prefixed string, this is not always detected, and a UID3 range check warning indicates a different string was parsed (dropping the first two chars as if 0x was there).

source.. = src/
output.. = bin/
bin.includes = META-INF/,\
               .,\
               data/,\
               plugin.xml