Changes in QMBF 5.00:
---------------------

- the parameter names for built-in models have changed and now match the
naming scheme (placement of underscores and indices) used in XMBF.
Note that .mbf session files generated by older QMBF versions are still read
correctly by QMBF version 5 (but the parameter names will be displayed differently,
and bootstrap will generate output files named according to the new scheme).
The motivation for this change was that QMBF and XMBF now share
a lot of code, making future development/maintenance easier and less prone to bugs.
Additionally, having the same naming scheme should be convenient for the user when
switching between QMBF and XMBF.

- added Non-symmetric Matrix Fit models (see the user manual for details)

- in the "Fit Settings" tab: added an option to change the normalization of the data correlation matrix
(see the user manual for details)

- added a new entry in the "Tools" menu, which allows to write the fit results and the
full parameter covariance matrix to files in the output directory

- effective mass plots are improved: effective mass points equal to "nan"
(log of a negative number), are no longer written to the grace file (instead, they are omitted).
This eliminates a problem with incorrectly rendered plots.

- for user-defined models, QMBF now performs several internal checks of the names of the parameters,
constants and variables (test for uniqueness, test for invalid substrings)

- .mbf files now contain the version of QMBF that was used to save them.

- removed the models with "Exponential Amplitudes" (these were never used, let me know
if you need them and I will put them back in).