Add more names to osm_entity_bits so we cover all usable cases

Author: joto

include/osmium/osm/entity_bits.hpp

@@ -67,9 +67,18 @@ namespace osmium {
             nothing   = 0x00,
             node      = 0x01,
             way       = 0x02,
+            nw        = 0x03, ///< node or way object
             relation  = 0x04,
+            nr        = 0x05, ///< node or relation object
+            wr        = 0x06, ///< way or relation object
             nwr       = 0x07, ///< node, way, or relation object
             area      = 0x08,
+            na        = 0x09, ///< node or area object
+            wa        = 0x0a, ///< way or area object
+            nwa       = 0x0b, ///< node, way or area object
+            ra        = 0x0c, ///< relation or area object
+            nra       = 0x0d, ///< node, relation or area object
+            wra       = 0x0e, ///< way, relation or area object
             nwra      = 0x0f, ///< node, way, relation, or area object
             object    = 0x0f, ///< node, way, relation, or area object
             changeset = 0x10,