version 0.6pre: xx.xx.2018
--------------------------------
version 0.5: 13.06.2018
-added: line-shape function was added to help
-changed: default parameters iterations-per-peak=6000
--------------------------------
version 0.4: 14.09.2017
-fixed: changed to work with the tk8.6-blt2.5 on ubuntu-16.04; 
        depends now on wish8.6
--------------------------------
version 0.3: 09.09.2017
-added: verbose parameter (this is used to control output while the fit is running); can be changed in gui-submenu
-added: moments are calculated wherever possible
-added: canvas size is guessed at startup
--------------------------------
version 0.2: 24.04.2017
-changed: loaded lineshapes with the exception of the gl will be activated for fitting by default
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version 0.16: 13.02.2014
-added: warning when more than 4K points
-fixed: error upon finishing fit1D with constraints
--------------------------------
version 0.15: 26.08.2013
-added: import simpson data
-fixed: no-noise spectra show slow convergence, active-GL-line not shown
-changed: hiddenfilebutton behavior now doesn't require changes in file tkfbox.tcl
-added: referencing for the ppm scale done for spe-spectra exported via conbin2spe.gun
--------------------------------
version 0.14: 05.10.2011
-allows manual setting of frequency and intensity range
-fixed: phase fitting real after complex dataset causes error message
--------------------------------
version 0.13: 28.09.2011
-requires BLT2.5 (self-compiled from the wize-project) and tcl8.5
-modified help, GPL added, packaged, examples added
--------------------------------
version 0.12: 
-works with BLT2.4 and tcltk-8.4 (ubuntu-10.04-LTS)
-changed: help page
-changed: default values for iterationsperpeak, width, fact
-minor: more {} in expr, fonts
--------------------------------
version 0.11: 14.04.2008
-checked: areas are ok
-added: constraints (enter into field: "shift0*sqrt(2)+area1")
-added: show values on expansion,left,right mouse click
-added: read fitted lineshapes
-removed: button "update sum"
-changed: tick spacings and tick format
-changed: remove current peak
-added: plot to png,bmp,ps,jpg,gif
-added: expand-mouse-bindings packed into procedure
-code cleanup: ampl->areas
-fixed: errors in xi2, xi2abs, updatesinglepeak, updatesum caused by zero-noise spectra 
-------------------------------
version 0.10
-added: reads complex data
-added: 0th order phasing; phase fitting; phase is stored in *.log1D.
-removed bug: in updatesinglepeak, divide by zero
-added: remove-peak-button only available if at least one peak exists
-added: fit1D fits only activated parameters
-added: plot to postscript
-added: open file from command line
-------------------------------
version 0.09
-removed bug in expand1D; "can't use empty string...."
-removed bug in xi2; line 38 " {sqrt(abs($am)*$wi/($pi*2*$znoise*$fact)-pow($wi,2)/4)}]"
