added utf8 encoding line to python templates

python breaks if it encounters special characters
in files without specified encoding.
Which is especially funny if you've got umlauts
in your name.
Update revision to 3.7.1git
Merge branch 'maint'
grc: add bus ports

Bus ports allow ganging together of block input or output ports into
a single display item for connection to other bus ports.
Merge branch 'maint'
Merge branch 'maint'
Merge branch 'maint'
grc: Fix whitespace issue in grc to use proper spaces

Remove all \t's to match the rest of GNU Radio
Merge branch 'maint'
fec: fix uninitialized class member in decode_ccsds_27

CID 1043258
cmake: Windows packages automatically include compiler runtime DLL's to remove an installation step
Merge branch 'maint'
Merge commit '2520369' into maint
Merge commit 'b736a6'
Merge branch 'maint'
Created atsc_rx.py and removed obsolete scripts

Several bug fixes and speedups rolled into one ATSC
decoder script. The old method included separately
launched scripts linked with named pipes, this was
tedious and slowed down decoding, so I have moved
their functionality into one flowgraph.
uhd: squashed per-channel stream support
some omissions from orig. buspot delivery
indent error fix
volk: fix some ARM test functions that resulted in an infinite loop on some processors.