Adds a note about upgrading bokeh

UPGRADE.fr.md

+Sauf indiqué, cette procédure prends en compte par défaut les distributions GNU/Linux Ubuntu et Debian
+
+# Mise à jour de Bokeh
+
+La mise à jour d'un portail se fait en plusieurs phase: mise à jour des sources puis mise à jour de la base de données.
+
+## Mise à jour des sources
+
+Les sources peuvent être mises à jour avec le script qui suit à adapter en fonction de vos besoins
+
+script install.sh
+```
+#!/bin/bash
+exec_path="$( cd "$( dirname "$0" )" && pwd )"
+source $exec_path"/install-util.sh"
+
+
+STABLE_VERSION=$(cat $exec_path/stable)
+
+if [ -d opacce ]; then
+  nextStep "Update opacce"
+  executeCommand "cd opacce; git reset --hard HEAD; " "error on reset"
+else
+  nextStep "Clone opacce"
+  executeCommand "git clone git@git.afi-sa.fr:afi/opacce opacce; cd opacce" "Unable to clone"
+fi
+
+nextStep "Switch to stable version $STABLE_VERSION"
+executeCommand 'git fetch -t --all' '[ERROR] Unable to fetch'
+git branch -f "stable-$STABLE_VERSION" $STABLE_VERSION
+git checkout "stable-$STABLE_VERSION" || die '[ERROR] Unable to checkout to stable version'
+
+updateSubmodules
+
+version=`git branch |grep "^*"|cut -c3-`
+version_stable=`cat ../stable`
+if [ "$version" == "stable-"$STABLE_VERSION ]; then
+  successMessage
+else
+  errorMessage
+fi
+```
+
+script install-util.sh
+```
+#!/bin/bash
+
+function nextStep() {
+    echo ""
+    echo "==== $1 ===="
+    echo ""
+}
+
+
+function die() {
+    echo $1
+    exit 1
+}
+
+
+function executeCommand() {
+    cmd=$1
+    echo "$cmd"
+    eval  $cmd || die $2 > /dev/null 2>&1
+    echo "done"
+    echo ""
+}
+
+function printError() {
+    errors=$errors$'\n'$1
+}
+
+function forceExecuteCommand() {
+    cmd=$1
+    echo "$cmd"
+    eval  $cmd  || printError $2 > /dev/null 2>&1
+    echo "done"
+    echo ""
+}
+
+function printErrors() {
+    echo $errors
+}
+
+function switchSymLinks() {
+    local client_dir=$1
+    local absolute_current_dir=$2
+
+    forceExecuteCommand "ln -fs $absolute_current_dir/index.php $client_dir/index.php && 
+ln -fs $absolute_current_dir/public $client_dir/ && ln -fs $absolute_current_dir/cosmogramme/index.php $client_dir/cosmogramme/index.php && ln -fs $absolute_current_dir/cosmogramme/cosmozend $client_dir/cosmogramme/ && ln -fs $absolute_current_dir/cosmogramme/css $client_dir/cosmogramme/ && ln -fs $absolute_current_dir/cosmogramme/images $client_dir/cosmogramme/ && ln -fs $absolute_current_dir/cosmogramme/java_script $client_dir/cosmogramme/ && ln -fs $absolute_current_dir/cosmogramme/php $client_dir/cosmogramme/ && ln -fs $absolute_current_dir/cosmogramme/sql $client_dir/cosmogramme/" "can't link to $absolute_current_dir" "Unable_to_link_file_in_$client_dir"
+}
+
+
+function cloneBranch() {
+    local BRANCH=$1
+    if [ -d $BRANCH ]; then
+	nextStep "Update $BRANCH"
+	executeCommand "cd $BRANCH; git reset --hard HEAD; " "error on reset"
+    else
+	nextStep "Clone $BRANCH"
+	executeCommand "git clone -b $BRANCH git@git.afi-sa.fr:afi/opacce $BRANCH; cd $BRANCH"  "Unable to clone"
+    fi
+    nextStep "Switch to  version $BRANCH"
+    executeCommand 'git fetch -t --all' '[ERROR] Unable to fetch'
+
+    updateSubmodules
+}
+
+
+function updateSubmodules() {
+    if [ -d afi ]; then
+	nextStep "Update proprietary addons"
+	executeCommand "cd afi; git reset --hard HEAD;git pull; cd .." "Unable to pull "
+    else
+	nextStep "Clone proprietary addons"
+	executeCommand "git clone git@git.afi-sa.fr:afi/opacpriv afi" "Unable to clone"
+    fi
+
+    pwd
+
+    nextStep "Install flash components"
+    executeCommand "cp -rf afi/public/opacpriv/flash public/opac/flash" "Cant copy in public/opac/flash"
+
+    nextStep "Update submodules"
+    executeCommand "git submodule init && sh update.sh" "Can't update submodules"
+
+    nextStep "Set permissions on temp folder"
+    forceExecuteCommand "chmod -R 777 temp" 
+
+    nextStep "Check install"
+}
+
+
+function successMessage() {
+    echo "[DONE]"
+    echo "[IF NEEDED] copy and configure index.php,config.ini,cosmogramme/config.php"
+    echo "Enjoy :)"
+}
+
+
+function errorMessage() {
+    local version=$1
+    echo "[ERROR] wrong version : $version"
+}
+
+
+function updateSymlinksAndTest() {
+    local BRANCH=$1
+    local CLIENT_DIR=$2
+    local branch_dir=$3
+    local version=`git branch |grep "^*"|cut -c3-`
+    if [ "$version" == "$BRANCH" ]; then
+	switchSymLinks "$CLIENT_DIR" $branch_dir
+	echo '{ "branch" : "'$version'"}' >  "$branch_dir/public/opac/branch.txt"
+	successMessage
+    else
+	errorMessage
+    fi
+}
+
+```
+
+exemple du fichier stable
+```
+6.54.2
+```
+
+## Mise à jour de la base de données
+
+La base de données peut être mise à jour en ligne de commande ou via l'interface.
+
+```
+$ php cosmogramme/php/upgrade_db.php
+```
+