miss ignore #914
add testcase for #914
Merge pull request #912 from afc163/master

fix coverage culculate error, #911
Update README.md
Update README.md
Update README.md
add testcase for #914
update .travis.yml
3.1.1
remove mirror
update source to registry
add postinstall script
remove shortcut for `--registry`
Merge pull request #920 from spmjs/source-registry

Update source to registry
import father replace getSourceFiles, fix #921