Remove extra reference actions in parsers.
Remove extra reference actions in parsers.

Make parse_object use json_object_set_new_nocheck and make parse_array
use json_array_append_new, remove json_decref from error and success
paths.

Fixes #376

Mephistophiles/jansson,markalanj/jansson,AmesianX/jansson,AmesianX/jansson,bstarynk/jansson,Mephistophiles/jansson,akheron/jansson,markalanj/jansson,bstarynk/jansson,markalanj/jansson,bstarynk/jansson,akheron/jansson,akheron/jansson