Remove unused errstr from BSON object
Merge pull request #92 from noa--/remove_unused_bson_errstr

Remove unused errstr from BSON object
Remove unused errstr from BSON object
Merge remote-tracking branch 'origin/master' into bson_ownsData

Conflicts:
	src/bson.c
	src/mongo.c
	test/write_concern_test.c