runtime: adding getRe() method to ctrlport (get knobs whose key matches a list of regex expressions)
cmake: adding gnuradio-pmt to GnuradioConfig.cmake
fft: adding ctrlport psd probe block
Merge remote-tracking branch 'github/master'
audio: try a couple times before accepting that an alsa device is busy
grc: revert ce52bd370 fixes problem with order
grc: allow multiple ports with varying nchan
grc: fix port names (index relative to port type not absolute)
core: check if messages blocks are finished
grc: white background
grc: white blocks for nicer screenshots
blocks: add append option to file sink