Packaging changes

Rename CMake option from ENABLE_PYTHON to BUILD_TESTING
Fix library version number

Use Project_Name in CMakeLists files

Update CMakeLists for use as a submodule
Add a decimator class (in progress)
Also an audio equalizer

Release for debian packaging

0.4.1

Add process function for iir_df, use rate=32 for test_decimate

Bug fixes for Remez bandpass/bandstop & complex bandstop

0.4

Try to fix linux warnings for fir_plot app

Add install targets and new release for homebrew installation

No code changes, just support for install and homebrew install

FIR filters with transformations and Windows complete

No known issues for IIRs, FIRs, or Windows. QT Apps for each case

Support for FIR,IIR and Window functions

No known issues for FIR, IIR and Window functions