Merge pull request #766 from onlineth/patch-2

Spelling fix

README.md

@@ -15,4 +15,4 @@ Now determine your js.org subdomain: either choose your username or the name of
 Add a file named ```CNAME``` to your repo (in the ```gh-pages``` branch for project pages) with a single line matching the domain you have chosen (e.g. ```foo.js.org```). If you prefer a webinterface form, have a look at [GitHub Pages Help](https://help.github.com/articles/adding-or-removing-a-custom-domain-for-your-github-pages-site/).
 
 ### Step 4
-To finish the procedure, make a pull request in this GitHub repository that adds your subdomain to the [list](https://github.com/js-org/dns/blob/master/cnames_active.js) of exisiting JS.ORG domains. Your new URL should go live within 24 hours (keep an eye on your pull request in case of a naming conflict).
+To finish the procedure, make a pull request in this GitHub repository that adds your subdomain to the [list](https://github.com/js-org/dns/blob/master/cnames_active.js) of existing JS.ORG domains. Your new URL should go live within 24 hours (keep an eye on your pull request in case of a naming conflict).