Removed undefined clear() functions in FM, Resonate, Simple, and Sampler classes; a few documentation updates in preparation for 4.5.0 release.

include/Resonate.h

@@ -36,9 +36,6 @@ class Resonate : public Instrmnt
   //! Class destructor.
   ~Resonate( void );
 
-  //! Reset and clear all internal state.
-  void clear( void );
-
   //! Set the filter for a resonance at the given frequency (Hz) and radius.
   void setResonance( StkFloat frequency, StkFloat radius );