ensure cached encoder is only used when all settings are default
update version for v3.6.4
failing test for #106
Merge pull request #107 from simplejson/sort_keys_dump-106

Fix dump's implementation of sort_keys
Fix memory leak when an error occurs encoding dict items
Merge pull request #110 from kbussell/memoryleak

Fix memory leak when an error occurs encoding dict items, fixes #109
update CHANGES and bump version to v3.6.5
Merge pull request #1 from simplejson/master

sync from origin