Set LICENSE.
Still does not build with guile20, so leave it at 1.8.
Version 1.1.11
* Fixed issue with linking Lex library.
Version 1.1.10
* Fixed memory leak in evaluator_create function implementation.
Version 1.1.9
* Fixed bug in math_step function implementation.
* Updated manual.
Changes:
Version 1.1.8
* Fixed bugs in the Fortran interface.
* Updated pkg-config file.
Version 1.1.7
* Fixed wrong derivative calculation for erf function.
Version 1.1.6
* Added support for erorr function (erf).
Version 1.1.5
* Re-licensed under GNU Public License version 3.
changes:
* Added support for constants e, log2(e), log10(e), ln(2), ln(10), pi,
pi/2, pi/4, 1/pi, 2/pi, 2/sqrt(pi), sqrt(2) and sqrt(1/2).
* Fixed bug with using global instead of evaluator specific symbol table
variable in evaluator_get_variables() function.