Adds a single file definition to provide a single point to add
new tunes and clearly understand, the useage: it need to be
stopped will it not allow interruption.
_default_tunes was marked as 'const char *' array, which means the data
of the array was not actually const and thus landed in the data section
(so in RAM instead of FLASH).
The size of the array is 64 bytes.
BazookaJoe1900