principles of flat design first part.
Rename 2013-06-8-principles-of-flat-design.md to 2013-06-08-principles-of-flat-design.md
update principles of flat design.
update principles of flat design.
Update 2013-06-08-principles-of-flat-design.md
Update 2013-06-08-principles-of-flat-design.md
principles-of-flat-design completed.
Merge branch 'origin/draft'