bugfix in modules "ICA decomposition", "ICA filter" and "Topoplot"
1. I fixed a major bug in the ICA decomposition module, as well as in the ICA edit matrix module. If you have run ICA using LW4, you should run it again to make sure that the obtained matrix is correct.
2. Fixed a number of bugs in the ICA filter module which led to the raising of exceptions.
3. Added an option to plot time series in the topoplot module.