ZHANG, Ruda September 30, 2018:  CSS redesign; more edits. [dd44d96]
Ruda Zhang August 07, 2016:  Replace tab with two spaces. [adaa87b]
Ruda Zhang June 26, 2016:  one sentence per line [e15360a]
Ruda Zhang June 26, 2016:  remove H1 title in markdown body [9c936db]