Merge pull request #6 from yulijia/gh-pages

Two new articles
email address too wide; change to vis@supstat.com
add sina weibo
shorten the filename for shorter permanent link
I cannot be both reviewer and author
larger plots and crop the white margins
the source code of pchShow() is not particularly interesting, so hide it
taller plot for the color brewer palette, and show a short example of brewer.pal()
tweaking words and meta information
use lower-case tags
a --> an
add RColorBrewer to dependencies
rebuild the website
lower case s
tweaking meta info
fork me on github
hide the banner when page width is smaller than 960px
as R core team as the author of two posts, per reminder of @hadley
this is a short article; not worth crowded authors there
make it crystal clear that demo(plotmath) is entirely R core's code