Add EngineFilterButterworth8::reset function to dynamically change filter's frequency
Remove asserts from EngineFilterButterworth8::reset()
Clear buffers after reset in EngineFilterButterworth8::reset()
Rename EngineFilterButterworth8::reset() into EngineFilterButterworth8::setFrequencyCorners()
Remove code duplication in the EngineFilterButterworth8 class
Fix last commit (forgot to set buffer size in constructor)
Create new classes for dynamic EQ: EngineFilterButterworth8Low, EngineFilterButterworth8Band, EngineFilterButterworth8High. Use new classes instead EngineFilterButterworth8. Also remove unneeded enum filterType
Coding style fixes
TODO about ramping in Butterworth filter
Merge pull request #54 from xorik/dynamic-butterworth

Add EngineFilterButterworth8::setFrequencyCorners function to dynamically change filter's frequency