added ssh-copy-id plugin for use on machines without it built-in

plugins/ssh-copy-id/ssh-copy-id.plugin.zsh

@@ -0,0 +1,53 @@
+# There's probably a better way to define this if 
+ssh-upload-id () {
+	RSAKEY="${HOME}/.ssh/id_rsa.pub"
+	DSAKEY="${HOME}/.ssh/id_dsa.pub"
+
+	if [ $# -eq 2 ]; then
+		KEY=$1
+		if [ ! -r $KEY ]
+		then
+			echo "'$KEY' does not exist or is not readable"
+			return 1
+		fi
+		SERVER=$2
+	else
+		if [ -r ${RSAKEY} ]; then
+			KEY=$RSAKEY
+		elif [ -r ${DSAKEY} ]; then
+			KEY=$RSAKEY
+		else
+			echo "No RSA or DSA key found"
+			return 1
+		fi
+		SERVER=$1
+	fi
+
+	if [ $# -lt 1 -o "$1" = "-h" ]; then
+		echo "Usage: $0 [publickey_file] [user@]machine"
+		return 1
+	fi
+
+	# testing above
+
+	echo "Copying $KEY to $SERVER"
+
+	cat $KEY | \
+		ssh $SERVER 'mkdir -p -m 0700 ${HOME}/.ssh && \
+		cat >> $HOME/.ssh/authorized_keys && \
+		chmod 0600 $HOME/.ssh/authorized_keys'
+
+	if [ $? -eq 0 ]; then
+	    echo "Public key installed on $SERVER"
+	    return 0
+	else
+	    echo "Sorry, an error occurred!"
+	    return 1
+	fi
+}
+
+# alias it to ssh-copy-id if it doesn't exist, like on OS X
+EXISTING_CHECK=`which ssh-copy-id`
+if [ $? -ne 0 ]; then
+	alias ssh-copy-id=ssh-upload-id
+fi