Update README.md
Update README.md
update exeq to 0.6.0, fix #839
Merge github.com:spmjs/spm
Merge pull request #898 from afc163/master

Add nprogress for doc page
Merge pull request #899 from afc163/issue-839

update exeq to 0.6.0, fix #839
Merge github.com:spmjs/spm
simplify exeq execute way