TODO.txt

TODO:
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 * Add more tests;
 * Add support to change Font preferences (Italic, Bold, ...);
 * Throw exceptions upon failure instead of exit();
 * Extend support to a few more Eigen data types: ArrayXd, ArrayXXf;
 * Add support to Qt data types: QVector<int>, QVector<qreal>, QVector<double>;
 * Rethink the approach to support a variable number of parameters for plot();