Merge branch 'next' of gnuradio.org:gnuradio into next
vocoder: updating QA test for vocoders.
Merge branch 'master' into next

Used merge strategy -s ours to skip over release commits
Merge branch 'master' into next
Merge branch 'next' of gnuradio.org:gnuradio into next
pmt: fixing a few files with older pmt naming style.
comedi: converting to new API structure.
noaa: converting to new API structure.
pager: converting to new API structure.
Merge branch 'master' into next
Merge branch 'master' into next

Conflicts:
	gnuradio-core/src/python/gnuradio/gr/CMakeLists.txt
Merge branch 'master' into next
Merge branch 'master' into next

Conflicts:
	gr-digital/examples/demod/ber_simulation.grc
	gr-digital/examples/demod/digital_freq_lock.grc
	gr-digital/examples/demod/pam_sync.grc
	gr-digital/examples/demod/pam_timing.grc
digital: fixed up examples for the updated location of blocks.
digital: fixed a typo preventing timing loop update in GRC.
digital: setting grid position of sliders in digital examples.
qtgui: added ability to clear waterfall plot data from GR block.
qtgui: added auto-scale checkbox to time plot.
qtgui: adding features to QT-based time plotters.

Made parent class to make updates to all types easier.
qtgui: wip: working on improving PSD plotters.