adjust parser config: smarter and support tables

- no_intra_emphasis: do not parse emphasis inside of words.
- tables: parse tables, PHP-Markdown style
- fenced_code_blocks: parse fenced code blocks, PHP-Markdown style.
  Blocks delimited with 3 or more `~` or backticks will be considered as code
- autolink: parse links even when they are not enclosed in `<>` characters.
css: adjust table colors
new post: 2014-07-12-Study-Linux-Team.md