misspelling/typo correction: administrativia -> administrivia
Merge pull request #287 from modelm/gh-pages

misspelling/typo correction: administrativia -> administrivia
Merge branch 'gh-pages' of github.com:codeguy/php-the-right-way into gh-pages
Merge commit '9537d87cd89ac77c9277a0e5d92c81cafbb86428' into gh-pages

Conflicts:
	_posts/03-05-01-Command-Line-Interface.md
Merge commit '73dc9c5b0401157cf84da0f90ffb55a66f980362' into gh-pages