Fixed copyright scripts for Mac OS

[arango]

The copyright.sh and copyright.bash were failing on the Macs due to the syntax for sed. We need to add the -e argument so now we have:

if ( $verb == 1 ) then
  grep -l "${search}" $FILE && sed -i -e "s|${search}|${replace}|g" $FILE
else
  grep -l "${search}" $FILE > /dev/null && sed -i -e "s|${search}|${replace}|g" $FILE
endif

Many thanks to Dave Robertson for fixing these scripts. They now work on both Unix and Mac operating systems.