HTTP requests should be triggerable by HTTP verb methods or by promise syntax

[kadamwhite]

For maximum flexibility and convenience, both callback and promise-style syntax should be valid: This is the rationale for pulling in a Promise lib as per #2

// Callback-style
wp.posts().filter({ posts_per_page: 7 }).get(function(err, data) {
  if ( err ) {
    // handle error
  } else {
    // do something with data
  }
});

// Promise-style
wp.posts().filter({ posts_per_page: 7 }).then(function(data) {
  // do something with data
}, function(err) {
  // handle error
});

Additionally, if .then is called on a query chain, it assumes the GET method unless otherwise specified:

wp.posts().id(7).data(postObj).put().then(function(response) { /* ... */ });

[kadamwhite]

Speaking of verbs, here's an overview of PATCH

[kadamwhite]

The first part of this should be addressed by #12 : I'll open a separate issue for PATCH. Leaving this open pending code review; let me know if it's working for you.

[kadamwhite]

Closing in favor of #22