Finally, a long awaited (and MAJOR) change: HNW is gone, it is now PSUM. This name should be clearer and every occurences of "HNW" (even in temporary variables or algorithms) have been replaced by psum. A check is performed on keys containing "hnw" and an exception is thrown if some are found, urging the user to update the ini file. Please keep in mind that the calling codes have to now refer to MeteoData::PSUM and that some algorithms are now named differently!