Pycorrfit

- Issue closed. External weights from averages saved in session (11).
- Solved minor bugs
- Added estimation of errors of fit (Issue 12/14)
- Fixed: Some .fcs files containing averages were not imported.

- Bugfix: Issue 10; we now have a goodness of the fit, if weighted
fitting is performed
- Bugfix: Weights for fitting not properly calculated (sqrt(std)).
- Bugfix: Batch control IndexError with Info window opened
- Tool Statistics: Sort values according to page numbers
- Tool global: Added weighted fitting
- Residuals: According to weighted fitting, weighted residuals are plotted
- Average: Variances from averaging can be used for weighted fitting

- Feature: Added Python shell
- Bugfix: Saving image was not performed using WXAgg
- Bugfix: Notebook pages were drag'n'dropable
- Update function now works in its own thread
- Code cleanup: documentation of model functions
- Added program icon

- File import dialog was enhanced (4, 5 - subsequently 7, 8):
- Now there is only one "load data" dialog in the file menu
- The model function is chosen for each type of data that is
to be imported (AC, CC, etc.)
- Bugfix: Channel selection window causes crash on file import (1).
- Bugfix: Hidden feature changes fixed parameters during fitting (2).
- Feature: Convert TIR model function parameters lambda and NA to sigma (3).
- Code cleanup: Opening data files is now handled internally differently.

- Initital GitHub commit