[task #216] Move lib in core directory

htdocs/adherents/card_subscriptions.php

htdocs/adherents/class/adherent.class.php

htdocs/admin/agenda_extsites.php

htdocs/admin/company.php

htdocs/admin/system/dolibarr.php

htdocs/comm/action/class/actioncomm.class.php

htdocs/comm/action/index.php

htdocs/comm/action/listactions.php

htdocs/comm/fiche.php

htdocs/compta/charges/index.php

htdocs/compta/facture.php

htdocs/compta/facture/class/facturestats.class.php

htdocs/compta/journal/purchasesjournal.php

htdocs/compta/journal/sellsjournal.php

htdocs/compta/resultat/clientfourn.php

htdocs/compta/stats/cabyuser.php

htdocs/compta/stats/casoc.php

htdocs/compta/tva/clients.php

htdocs/compta/tva/index.php

htdocs/compta/tva/quadri_detail.php