[GiNaC-list] Release 1.7.3

[Richard B. Kreckel]

Hi,

A new GiNaC version has just been released. These are the changes:
* Speed up some corner cases of polynomial factorization.
* Speed up some corner cases of gcd computation.
* Speed up factorization of pre-factored polynomials.
* Make matrix::solve() work with hidden (non-normal) zeros.
* Fix bug in evaluation of real and imaginary parts of powers.
* Fix some LaTeX output, add new function symbol::get_TeX_name().

The following people have contributed patches to this release:
- Vladimir V. Kisil
- Richard B. Kreckel
- Vitaly Magerya

Happy hacking!
  -richy.