doc apiref: Enhancements
doc apiref: Enhancements

Constructors are described more clearly and return values on error
situations more compehensively. Also add an example of the object
iteration protocol.

gameclosure/jansson,attie/jansson,OlehKulykov/jansson,simonfojtu/FireSight,akheron/jansson,slackner/jansson,janetuk/jansson,rogerz/jansson,markalanj/jansson,wirebirdlabs/featherweight-jansson,bstarynk/jansson,firepick1/FireSight,firepick1/FireSight,liu3tao/jansson,gameclosure/jansson,akheron/jansson-debian,firepick1/jansson,janetuk/jansson,Vorne/jansson,akheron/jansson-debian,akheron/jansson-debian,firepick-delta/FireSight,gameclosure/jansson,firepick1/jansson,yahoo/ygloo-external-jansson,yahoo/ygloo-external-jansson,akheron/jansson,bstarynk/jansson,simonfojtu/FireSight,Mephistophiles/jansson,firepick1/jansson,markalanj/jansson,slackner/jansson,akheron/jansson-debian,bstarynk/jansson,rogerz/jansson,rogerz/jansson,AmesianX/jansson,liu3tao/jansson,akheron/jansson,firepick-delta/FireSight,chrullrich/jansson,janetuk/jansson,rogerz/jansson,chrullrich/jansson,simonfojtu/FireSight,firepick1/FireSight,npmccallum/jansson,janetuk/jansson,wirebirdlabs/featherweight-jansson,attie/jansson,OlehKulykov/jansson,AmesianX/jansson,npmccallum/jansson,markalanj/jansson,Vorne/jansson,yahoo/ygloo-external-jansson,yahoo/ygloo-external-jansson,Mephistophiles/jansson,firepick-delta/FireSight