Give `null` as date for draft posts
typo (inforcement > enforcement)
Merge pull request #236 from ericandrewlewis/master

typo (inforcement > enforcement).  Closes #236.
Merge pull request #230 from WP-API/draft-post-dates

Give `null` as date for draft posts.  Closes #230.
Merge pull request #235 from DrewAPicture/standards

Coding Standards audit
Merge branch 'master' into dry