Merge branch 'next' into wip/filter-rm-next

Conflicts:
	gnuradio-core/src/lib/swig/CMakeLists.txt
qtgui: adding stand-alone waterfall form/plots.
qtgui: added block tree file for qtgui to better organize blocks.
qtgui: added spectrogram static plot and updated others.
qtgui: added freq sink specific menu item to adjust the fft size.
qtgui: added setting/resetting of FFT size and averaging.
qtgui: added setting/resetting of FFT size for waterfall plots.
qtgui: bug fixes to time plots.
core: adding ability to change and reset skiphead parameters.
qtgui: wip: adding form around static plot tools to adjust start and end num samples.
Merge branch 'wip/filter-rm-next' of vortex.corganenterprises.com:gnuradio-trondeau into wip/filter-rm-next
digital: Updated build system to look for gr-filter stuff.
filter: added kernel for adaptive fir filter.

Note: still need to update the blocks to use this new kernel.
digital: updated equalizers to use new gr::filter::kernel::adaptive_fir_ccc.
digital: updated CPM and GMSK modulators to use blocks out of gr-filter.
digital: updated mpsk_receiver and pfb_clock_sync_{fff,ccf} to use gr-filter.
digital: fixing build system to allow use of Volk and to use gr.filter
filter: bug fixes to use components in gr.filter and others fixes.

QA working for all but CMA and LMS equalizers.
digital: fixing up equalizers to work with new inheritance structure.
digital: need to look for this import in two places for either installed apps or QA code.