update the configure instructions

[rralian]

The configuration instructions pretty clearly show the heritage of this package. 😄 I had used meteor's github package as a base to start from. Just need to update the instructions for obtaining WordPress.com credentials and configuring the system.

[gdad-s-river]

Would this be done sometime soon? Because I desperately want this package.

[rralian]

I never saw the notification here, sorry. I haven't updated the instructions, but it's still usable as it is. Just perform the equivalent actions at https://developer.wordpress.com/apps/ and if you want to do a PR with updated instructions, you are an awesome human being. To be clear though this package is for OAuth with wordpress.com accounts, and not with self-hosted wordpress accounts.