When 'WhichParMethod' is 0, don't do any concurrency.
Merge pull request #2 from BurntSushi/disable-concurrent

When 'WhichParMethod' is 0, don't do any concurrency.
gofmt stuff
switched one norm and inf norm
Merge commit 'abfd4f7c90d8bcf72d9f180eb1e3f22e9be6febe' into go1