Added javadoc to new methods

getName, getName(locale), getRawName in PlainStreetEdge, Edge and Vertex
getName and getName(locale) returns Strings, getRawName returns
nonLocalized I18NString which will be localized later.
Removed unused resources from StreetVertexIndexServiceImpl

Calls to internals, and WayProperties are now through Singleton.
Removed unused createNamer method
Added javadoc to LocalizedString