Update README.md
update develop document
Merge branch 'master' of github.com:spmjs/spmjs.io
update styles
Update package.json.md
update document for package.json file, #989
Typo

https://github.com/spmjs/spm/issues/989
rename feed to history
add unpublish action to history
update history record
Merge pull request #73 from spmjs/history-model

History model
Update package.json.md
limit the length of item at index page
Merge branch 'master' of github.com:spmjs/spmjs.io
bump 1.2.0
update repository/search, support aralejs.org
Merge pull request #22 from spmjs/master

merge spmjs:master