Fixed error adding Kali's GPG key

The formerly used key ED444FF07D8D0BF6 expired and are not any more on the common key servers. The new key can be fetched directly from https://archive.kali.org/archive-key.asc. This resolves issue s-h-3-l-l#22 for good.

install.sh

@@ -19,7 +19,7 @@ fi
 /usr/bin/env python3 -V >/dev/null || die "Please install 'python3'";
 
 # Install all dependencies:
-apt-key adv -qq --keyserver pool.sks-keyservers.net --recv-keys ED444FF07D8D0BF6 || apt-key adv -qq --keyserver hkp://pool.sks-keyservers.net:80 --recv-keys ED444FF07D8D0BF6 || die "This may be a server issue. Please try again later";
+wget -q -O - https://archive.kali.org/archive-key.asc | apt-key add
 apt-get -qq -y -m install python3-apt || die;
 
 install -T -g root -o root -m 555 ./katoolin3.py "$DIR/$PROGRAM" || die;