update publish
more log
add unpublish
add client.info
add client.search
add client.login
add client.install
delete unuse
es6
user spm-client@0.2.0
spm-install
spm-login
spm-publish
spm-search
spm-unpublish
delete unuse test
update package.json
upgrade client@0.2.1, and build use client.install
Merge pull request #924 from spmjs/spm-client

Spm client
change sea-modules to spm_modules