Fit spectra by linear combination of its component spectra.
https://github.com/emptyewer/Fytt/releases/tag/2.6#Mac OS X
Open Fytt_OSX_x64.dmg and copy Fytt.app to Applications Folder#Windows
Open Fytt_2.6_Win32_x86.exe to install#Linux
Untar fytt_linux_x64.tar.bz2#Screenshot (Version 2.6)
