added a php-gettext check to the installer
added a php-gettext check to the installer

sahana/vesuvius,sahana/vesuvius,bobrock/vesuvius,ramdesh/vesuvius_installer,sahana/vesuvius,bobrock/vesuvius,bobrock/vesuvius,bobrock/vesuvius,sahana/vesuvius,ramdesh/vesuvius_installer,sahana/vesuvius,bobrock/vesuvius,ramdesh/vesuvius_installer,ramdesh/vesuvius_installer,bobrock/vesuvius