add v2.2.0 说明
update readme.md
update readme.md
update readme.md
update readme.md
update readme.md
update readme.md
update readme.md
Update README.md
Update README.md
fix bug for https://github.com/why520crazy/angular-w5c-validator/issues/6
Merge remote-tracking branch 'origin/master'
Merge branch 'master' into gh-pages