The initial modification of the template.

1. replace bootstrap 2 with bootstrap 3
2. update the config
3. remove unrelevant pages from navigation
4. update the default template
Commit the first part of the site

1. add the timeline
2. add the nav
3. init keydataset
Merge branch 'master' of github.com:opendatachinastory/opendatachinastory.github.io

* 'master' of github.com:opendatachinastory/opendatachinastory.github.io:
  update readme