v1.2 [LEGACY] -- Fixed bug and crashes when reading spectra

This "bug fix" release addresses issues with the parsing of the spectrum file (*.spec). Some bug in the code was making FAST++ crash, and prevented the program from fitting the galaxies for which no spectrum was provided. Runs which did not use a spectrum file were not affected. These aspects of the code have now been properly tested, and all work as intended.

NB: This is a "legacy" release. These versions of FAST++ are meant to reproduce the behavior of the old FAST and not introduce any other feature. If you want more fancy options and updated stuff, look for a non-legacy release.