add doc file for `edp beautify`
modified beautify doc
Merge remote-tracking branch 'trunk/master'
Merge remote-tracking branch 'trunk/master'

Merge from main source
Merge branch 'master' of https://github.com/ecomfe/edp

merge from ecomfe/edp
seperate edp beautify command
update edp beautify doc
Merge pull request #157 from virola/master

fix #135 : 独立edp beautify模块