Puts Post resource on root path

 modified:   config/routes.rb
Defines a path name for the Post page route

 modified:   config/routes.rb
Changes root url to posts#index action

 modified:   config/routes.rb
Reorders routes so that admin, static pages are matched before Post slugs

 modified:   config/routes.rb
Merge branch 'post-to-root-path' into develop-blog

 Moves Post resource to root path
 Reorders routes so that admin and static pages are matched before Post slugs