Renaming 'grc' to 'gnuradio-companion'

There has been a long time conflict between the GNU Radio Companion’s
executable binary ‘grc’ and the one for the Generic Colorizer which is
also ‘grc’.

As of the current git master, ‘grc’ has been renamed to
‘gnuradio-companion’. Interested users can add an alias to their
shell environment to execute gnuradio-companion when grc is invoked:

$ alias grc=‘gnuradio-companion’

This change will show up for users performing source installs via git,
and will become part of v3.3.0-rc1. Binary packages for Debian will
reflect this change when the freeze occurs for next release, and it is
unknown when this will show up in binary installs for Ubuntu.

Johnathan C.