update readme. add repo intro
add the method how to take part in repo
add contact info
rename file
update readme
remove .ds-stor
import debugging-javascript.md
update .gitignore
start working in debugging-javascript.md
import network.md
import cpu-profiling.md
shortcus.md
Merge pull request #3 from SunLn/master

cpu-profiling.md、shortcuts.md
Merge pull request #1 from CN-Chrome-DevTools/master

更新最新版