symsync: various improvements
symsync: various improvements

  * input parameter 'tau' now refers to fractional symbol delay
  * computing integer sample and fractional sample offsets accordingly
  * initializing random seed to time(NULL)

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