Rename EQ preferences check box and allow the user to modify the frequencies regardless the state of the check box
Use fidlib to create the Bessel filters
Use the new EngineFilterIIR constructor in analyserwaveform.cpp
Make Bessel filters receive frequency changes and fix crackles when frequency corners are changed for EngineFilterButterworth
Remove the hard coded filter coefficients
Some coding style improvements
Do ramping for Bessel filters
Fix crackles when changing frequency corners for High Pass Bessel filter
Refactor EngineFilterBloc::setFilters() to remove crackles when changing frequency corners.
Instant apply on Enable EQ check box
Change the text of the check box responsible for enabling the Bessel equalizers
Use a 4th order Bandpass Bessel Filter instead of an 8th order one
replace memmove with direct assignments, saves ~ 10 % CPU time
Merge pull request #1 from daschuer/bessel_freq_corners

replace memmove with direct assignments, saves ~ 10 % CPU time
Merge pull request #291 from badescunicu/bessel_freq_corners

Dynamic Bessel Equalizers
renamed butterwortheqeffect to butterworth8eqeffect
renamed Class to Butterworth8EQEffect and tweaked self doc