1) LibreSource config file
  - create a directory for the LibreSource indexation (kernel.indexationDataDir)
  - create a directory for the LibreSource file exchange (libresource.distributedFilesystem)
  - give to the postgres group the right to use these folders
     sudo chgrp postgres tmp/files tmp/index
     sudo chmod g+rwx tmp/files tmp/index
  - create the libresource database in PostgreSQL
  - create the libresource user in PostgreSQL
  - allow this user to be a superuser : 
    ALTER USER libresource WITH superuser;
  - Edit the file $LIBRESOURCE_HOME/Distribution/ls-config.properties
     in order to set your server properties
  - Edit the file $LIBRESOURCE_HOME/Distribution/build.properties
     in order to choose the service you want
  - Export the JONAS_ROOT path 
     (The following given path should be updated regarding your personnal configuration)
     on windows: SET JONAS_ROOT=c:/JONAS_4_7_x
     on linux  : export JONAS_ROOT=/opt/JONAS_4_7_x
  - Run "./ThirdPart/ant/bin/ant clean-all; ./ThirdPart/ant/bin/ant deploy" to build 
      the LibreSource ear and libresourceDS.properties and libresourceMail.properties and libresourceConfig.properties