new release of GNU libmatheval

[Aleksandar B. Samardzic]

GNU libmatheval relase 1.1.0 is out.  Updates include:
* Added support for number of mathematical functions (secantes,
  cosecantes, Heaviside step and Dirac delta functions).
* Added method to get list of variables appearing in given expression.
* Fixed issue with passing 32-bit, instead of 64-bit, pointers to
  Fortran code


GNU libmatheval is a library (callable from C and Fortran) to parse and
evaluate symbolic expressions input as text. It supports expressions in
any number of variables of arbitrary names, decimal constants, basic
unary and binary operators, and elementary mathematical functions. In
addition to parsing and evaluation, libmatheval can also compute
symbolic derivatives and output expressions to strings.