readme should say "lein new noir ...", not "lein noir new ..."

[uvtc]

Update Usage section in README.md to say "lein new noir my-website" instead of "lein noir new my-website".

[rf]

Ping, this needs to be merged!

[icholy]

👍 this had me confused for 20 minutes

[holyjak]

See the different attempts in #124, #128, #133