Log Message:
Changes 0.9.2:
* To compile fityk, Boost (only headers) and xylib must be installed first.
  Fityk tarball does not contain a copy of boost and xylib now.
* user-defined functions: split functions can be defined in this way:
  SplitG(h, c, w1, w2) = x < c ? Gaussian(h, c, w1) : Gaussian(h, c, w2)
* added info-numeric-format option
* a couple of bug fixes

Changes 0.9.1:
* added cfityk to Windows installer
* Unix only: fitting can be interrupted by the INT signal
* changed output of "info errors", see the manual for details
* GUI: "plot in @n" changes selected datasets (useful in scripts)
* many bugs fixed

Changes 0.9.0:
* GUI: Data > Editor dialog was replaced with two dialogs: Data > Table
  and Data > Edit Transformations
* added Lua bindings (configure option --enable-lua)
* a syntax to execute output from external program: command ! program [args...]
* xyConvert (which requires wx 2.9) is built by default.
  Added flag --disable-xyconvert, which must be used with wx 2.8.
* parsing of info command was rewritten, but functionality is almost the same
* bug fixes