ctrlport: updating examples.
filter: added callback to adjust resampling rate of pfb_arb_resampler block.
pager: fixed header install directory (copy/paste error).
atsc: adjustments to atsc to start to conform to v3.7 structure.

Not going to comply completely with the new structure; just wanted to get it so that it looked more consistent once installed.
Merge branch 'next' of gnuradio.org:gnuradio into next
Merge branch 'master' of gnuradio.org:gnuradio
Merge branch 'master' into next