Some problems / improvements.

[LehaMotovilov]

Hi guys!

Composer - version 1.2.1 (stable channel).

Add https please

{
      "type": "composer",
      "url": "http://wpackagist.org"
},

Because of:

[Composer\Downloader\TransportException]
  Your configuration does not allow connections to http://wpackagist.org/packages.json. See https://getcomposer.org/doc/06-config.
  md#secure-http for details.

And one problem with dep:
The requested package mcaskill/wordpress-substrate could not be found in any version, there may be a typo in the package name.