Get update utility in, add notes on it to README.

kmd/linux/verus-cli/update-verus-agama.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+if [ $# -eq 0 ]
+  then
+    echo "Usage: ./update-verus-agama.sh path/to/agama/directory."
+    echo "No arguments supplied, no updates applied."
+    exit 1
+fi
+
+PASSED=$1
+
+if [ -d "${PASSED}" ] ; then
+    if [ -f "${PASSED}/komodod" ] ; then
+        cp komodod ${PASSED}
+        cp komodo-cli ${PASSED}
+        exit 0
+    else
+        echo "No komodod found in ${PASSED}"
+        echo "Copying komodod and komodo-cli anyway"
+        cp komodod ${PASSED}
+        cp komodo-cli ${PASSED}
+        exit 0
+    fi
+else
+    echo "Pass the Agama-darwin-x64 directory on the command line."
+    echo "${PASSED} is not a valid directory.";
+    exit 1
+fi
+