First commit. Main window interface implemented
Interface with combo boxes
Implementer filter functions calculation
Implemented dynamic schematic update
Added stubs for filer schematic calculation
Implemented Sallen-Key low-pass filter calculation
Implemented Sallen-Key high pass filtersintez
Corrected bitterworth poles and zeros calculation routine
Implemented Chebyshev filter poles calculation
Implemented poles calculation with std::complex
Implemented Filter class
Started moving filter schematic sintez fo specific class
Filter schematic elements calculation methods moved to Filter class completely. Started filter schematic Qucs file generating implementation
Implemented basic Qucs schematic generation method
Implemented first-order stage schematic generation
Added SVG amplitude-frequency response to main window
First order schematic generation moved to filter.cpp
Implemented working high-pass SalleKey filter generation
Implemented low-pass sallen-key schematimatic sintez
First order stage schematic is generated all right