19/November/2001
* added the possibility of checking the XTAL with a custom IF
  value (different from 455 kHz or 10.7 MHz)

06/July/2001
* added examples to README
* added a check for mixing the XTAL frequency (and harmonics) with
  another (fixed) frequency: -m option
* version 1.1 released

28/Apr/2001
* version 1.0 released

