1) in order to build the whole system the TARGETSYS variable must point to either SRT or MED 
2) The documentation will be produced to the location pointed by the varialbe DOCROOT, if the variable is not set the
   default location $HOME/docroot is taken
3) The variable ACS_CDB is required to be set.
4) The variable SYSLOCATION is required to be set, the source will be dowloaded into this location, when executing the 'sources'
   make target
5) The variable SVNUSER is required in order to log into the SVN server


TODO:

1) for the stat target: it would be nice if the statistics are run over the MODULES selected for the target system. One stat for the each module and the
   grand total.
