add layoutit
Merge branch 'master' of https://github.com/justjavac/justjavac.github.com.git

# By 迷渡
# Via 迷渡
* 'master' of https://github.com/justjavac/justjavac.github.com.git:
  Create inheritance-and-the-prototype-chain.md
  Create js-best-practices-for-beginners.md
  Create learning-js.md