Added Gitter badge
Merge pull request #1051 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
Update README.md
Update README.md
Update README.md
Update spm-config
remove NODE_PATH check
add comment for `spm completion`
refactor (buildArgs): use mixarg instead of umi.buildArgs
refactor(build): remove umi, use father directly
feat(doc): add qrcode
feat(doc): use internal ip for localhost url
feat(publish): support specify registry in package.json

Close #1014
fix(build): idleading should be empty. Close #1055
fix(doc): fix test
feat(doc): improve qrcode ui
doc(build): update help info, Related #1061
fix(install): -SD don't work. Close #1024
test(cli): add testcase for cli
refactor(init): code style