Fix distributed-alignment export to ODF. [part of #726035]

2014-03-12  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* openoffice-read.c (odf_style_set_align_h): repeat_content and
	gnm_halign take precedence
	* openoffice-write.c (odf_write_style_cell_properties): write LO's
	version of DISTRIBUTED