qtgui: allowing autoscale to be turned on/off from GR app.
ctrlport: turn on autoscaling of figures by default; don't scale to max/min.
filter: fixing synthesis filter output rate when using 2x oversampling.
Merge branch 'maint'
Merge branch 'master' into next
qtgui: adding menu option to change sample rate on all plotters.
qtgui: adding menu option to change sample rate on all plotters.
qtgui: exposing more parameters for time raster.

Also fixes a memory bug when changing num rows or cols.
ctrlport: added time raster plot option to gr-ctrlport-monitor.
Merge branch 'next' of gnuradio.org:gnuradio into next