Rubocop now using Github master pending release w/its Issue 1051 fixed.

Also minor cleanup to Blog::BlogHelper#alerts_for internals to silence
RuboCop complaints re unused block parameters.

RSpec: 114 examples, 0 failures
Script: 0 tests: 0 failures, 0 errors, 0 pending, 0 omitted
RuboCop: 38 files inspected, no offenses detected
RuboCop global overrides in `.rubocop.yml`: 4
Updates per Mutations issue 67 discussion.

* CreateAndPublishBlogPost whitelisting *WORKS AS INTENDED*! Woohoo!
* CreateAndPublishBlogPost validation clarified with revealing new
  support methods;
* Blog::PostsController#create YAGNI cruft gone;
* Added Post `create` view (which is required by the controller change.

We're not quite ready to close *our* Issue #7 yet; NewPostForBlog needs
fleshing out (if not reevaluation entirely).

RSpec: 114 examples, 0 failures
Script: 0 tests: 0 failures, 0 errors, 0 pending, 0 omitted
RuboCop: 38 files inspected, no offenses detected
RuboCop global overrides in `.rubocop.yml`: 4