constructor TPoints.CopyPointVector added to create TPoints
from existing TRealPointVector;
bug in constructor TPoints.Combine corrected (it did not use Lb, but always
combined from 0
Filters:
LowPass,HighPass,Notch,BandPass,Chebyshev filters created.
For Gaussian filter special event OnInputBackward added
For all filters InitFiltering and NextPoint added for real time filtering.
Example for filtering written