Renamed ProfileBuilder to XMLProfileBuilder.
Renamed ReportBuilder to XMLReportBuilder.

XMLProfileBuilder: implemented .save(..).

ContentIndexFilter: added a new abstract method getType() which returns
a String representation of the type of the filter which is used to
identify the filter within the XML document.

HiddenFileFilter, ReadOnlyFileFilter, SizeCeilingFilter,
SizeFloorFilter, NameContainsFilter, PathContainsFilter: implemented
getType().