Merge branch 'new_eth' of http://gnuradio.org/git/matt into new_eth

Merge branch 'new_eth' of gnuradio.org/git/matt into new_eth

* 'new_eth' of http://gnuradio.org/git/matt:
  properly set the address filter
  stop sending short ethernet command packets.
  Fix problem with commands timing out (specifically stop_rx_streaming)
  Fix race condition that caused commands such as stop_rx_streaming to fail.
  Fixing a line in the clock recovery algorithm. This works with a bit larger error than there proably should be.
  Better fix for broken AC_PROG_F77 macro
  Fix Python header check failure due to invalid cached state
  waterfall and fft use a common autoscale function
  Fix so that the waterfall texture is initialized with a buffer of the same size.
  Modifications to usrp2 source and sink so that set center freq is called afer set lo offset.
  Modifications to the usrp blocks and wrapper so that the lo offset is set with the lo frequency.
  Removed subversion related configuration info.
  Expand frequency ranges to match hardware capability.
  Modified log power fft block so ref scale is peak to peak.
  Adding clock sync algorithm using PFB. This works, but needs a bit more work.