Added stubs for BandPass/BandStop filter calculation fuctions
Implemented dynamic GUI and filter parameters transfer
Added further stubs
Added band-pass filter order estimation
Added SallenKey bandpass filter calculation. It works. MFB bandpass doesnot works.
Implemented band-pass MFB filter calculation
Implemented MFB band-pass filter schematic generation
Implemented S-K topology autogeneration
Cauer band-pass filter implemented
Implemented Cauer BandPass filter circuit aotogeneration
Added auto-selection topology for band-stop filters
Implemnted Band-Stop filter
Corrected order estimation for Band-Stop filter
Added filter AFR preview for band-pass/band-stop. Need to index SVGs later.
Added schematics for bandpass and bandstop filters
Implemented band-pass/stop filter parameters checking
Added SVGs for filter circuits
Corrected part list and poles-zeros list printing
Added -Wall option for cmake build system, fixed some warnings, corrected *.pro file for qmake build system
Merge pull request #40 from ra3xdh/ra3xdh-activefilter

Ra3xdh activefilter -- Band Pass and Band Stop filters