reordered member variables for 4 byte alignment

Change-Id: Iaae7689d1ed3c74e261fcc90fa88b5521468e376
just beautify this a little

Change-Id: Ibd7da12d88ec8e965f652499f7e7e32f81bd8ccc
prepared XMLPropertyMapEntry with mbImportOnly flag

Change-Id: Id5a54a591a42c836884af1fd09dc055f2fce6db5
added bool bForExport parameter to XMLPropertySetMapper ctor

Set to true for export, false for import. If export true, an
XMLPropertyMapEntry with mbImportOnly==true is not added to the
mappings. This to be able to have more than one mappings for import
(for example a current extension namespace and the future namespace
proposed to the ODF-TC, or corrected typos in element or attribute
names), but map only to one entry on export, of course.

Change-Id: Ia01ea949c88eda2f8a6c10f51c59e35e7abdcaf3