change log
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May 24, 2011 (mathex 0.3 beta): compilation fix
November 06, 2003 (mathex 0.2.3 beta) fix bug on parameterless function call (Hugh Denman <denmanh@tcd.ie>)
Octuber 03, 2003 (mathex 0.2.2 beta) fix bug on parentesis expression (Hugh Denman <denmanh@tcd.ie>).
June 14, 2003 (mathex 0.2.1 beta) fixes the bug that accept unary minus/plus after binary operators.
June 12, 2003 (mathex 0.2 beta) first public release of this C++ version

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end of change log
