v0.7.2

• Add XmpMeta::set_localized_text (#133)
• Add XmpMeta::delee_qualifier (#132)
• Add XmpMeta::delete_struct_field (#131)
• Add XmpMeta::delete_array_item (#130)
• Add XmpMeta::contains_qualifier (#129)
• Add XmpMeta::qualifier (#128)
• Allow XmpMeta::array_item to accept XmpMeta::LAST_ITEM (#127)
• Add XmpMeta::array_item (#126)
• Add XmpMeta::delete_property (#125)
• Add XmpMeta::set_qualifier (#124)
• Add XmpMeta::compose_qualifier_path (#123)
• Add XmpMeta::array_len (#122)
• Add XmpMeta::set_array_item (#121)
• Implement Display for XmpMeta (#120)
• Add XmpMeta::compose_array_item_path (#119)
• Add XmpMeta::set_struct_field (#118)
• Add XmpMeta::append_array_item (#117)
• Add XmpMeta::namespace_prefix and XmpMeta::namespace_uri accessors (#116)