gmskframe: adding methods to synchronizer; needs tesing
gmskframe: adding methods to synchronizer; needs tesing

  * method to update instantaneous frequency estimate
  * method to push through matched filter (symsync)
  * method to push symbols through preamble synchronizer

manuts/liquid-dsp,cjcliffe/liquid-dsp,wangning223/liquid-dsp,manuts/liquid-dsp,jgaeddert/liquid-dsp,andrepuschmann/liquid-dsp,JayKickliter/liquid-dsp,cjcliffe/liquid-dsp,manuts/liquid-dsp,wangning223/liquid-dsp,andrepuschmann/liquid-dsp,biotrump/liquid-dsp,JayKickliter/liquid-dsp,wangning223/liquid-dsp,wangning223/liquid-dsp,andrepuschmann/liquid-dsp,JayKickliter/liquid-dsp,biotrump/liquid-dsp,JayKickliter/liquid-dsp,andrepuschmann/liquid-dsp,jgaeddert/liquid-dsp,andrepuschmann/liquid-dsp,biotrump/liquid-dsp,manuts/liquid-dsp,jgaeddert/liquid-dsp,cjcliffe/liquid-dsp,biotrump/liquid-dsp,cjcliffe/liquid-dsp,cjcliffe/liquid-dsp,manuts/liquid-dsp,JayKickliter/liquid-dsp,wangning223/liquid-dsp,biotrump/liquid-dsp,jgaeddert/liquid-dsp,jgaeddert/liquid-dsp