uhd: added a usrp PC sync option
uhd: added getters for bandwidth setting and range
runtime: changed remove_item_tag to only mark tags as deleted
Merge branch 'master' into next

Conflicts:
	gnuradio-runtime/lib/gr_block_detail.cc
Merge remote-tracking branch 'jblum/uhd_work'
Merge branch 'master' into next

Conflicts:
	gr-uhd/include/gr_uhd_usrp_sink.h
	gr-uhd/include/gr_uhd_usrp_source.h
	gr-uhd/lib/gr_uhd_usrp_sink.cc
	gr-uhd/lib/gr_uhd_usrp_source.cc
uhd: fix accidentally deleted file from previous merge
runtime: frontend interface changes
cmake: always find PMT includes in FindGnuradio.cmake
update FindGnuradio.cmake to use the standard method for libgnuradio-pmt
blocks: interleaved_short_to_complex switch to volk, allow vector short input option
blocks: fixed header documentation in repack_bits_bb
Merge branch 'master' into next