add readme
add index.html
add jekyll base structure
change index.html
delete all
renew
add README
add hadoop secondary sort
add layout:default to post, or your page encoding will be problematic
modify css to center post and add border
fail to center page
1. succesfully center the content
2. change the background color
1. modify post.html to remove site title from post page
2. change the background color and heading styles
nothing
change syntax.css to default (copy from https://github.com/richleland/pygments-css/blob/master/default.css)
change the css style of code block
add rounded border to code block
remove the height:100% of html,body which causes problem
nothing
minor fix