digital: scrambler gets tag support
digital: added scrambling feature to OFDM tx/rx
fft: fix missing set_window call on initialization
digital: fix for OFDM serializer QA after FFT block fix
Merge branch 'maint'
cmake: don't install controlport config file in two places. Just in etc/gnuradio.
Merge branch 'maint'
blocks: set default argument of file_descriptor_source so repeate=false. Bug for not carrying this over from 3.6.
Merge branch 'maint'
cmake: update revision to 3.7.0.1 for release
cmake: update revision to 3.7.1 for release
Merge branch 'maint'

Use merge strategy -s ours to skip release commit.
cmake: update revision to 3.7.2git
Merge branch 'master' of git://github.com/gnuradio/gnuradio into scrambler