2005-10-26 Brad Cavanagh <b.cavanagh@jach.hawaii.edu>
* Added greater than and less than operations.
2005-06-13 Alasdair Allan <aa@astro.ex.ac.uk>
* Added muliplication overloading
2005-06-10 Alasdair Allan <aa@astro.ex.ac.uk>
* Original version.