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

kmd/linux/verus-cli/README.txt

@@ -4,6 +4,7 @@ komodod - VerusCoin's enhanced Komodo daemon
 komodo-cli - VerusCoin's Komodo command line utility
 verus - wrapper for komodo-cli that applies the command to the VRSC coin
 verusd - wrapper for komodod that sets the VerusCoin parameters to defaults properly
+update-verus-agama.sh - script to update an existing VerusCoin enhanced Agama wallet install with this version of komodod. To update run the script and pass the path to the wallet on the command line: ./update-verus-agama.sh ~/Downloads/Agama-linux-x64
 
 The first time on a new system you will need to run ./fetchparams.sh before using komodod or verusd.
 On Ubuntu 18 systems you will need to run these two commands before running the command line tools:

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
+