Review API tests
Update exporting collection (have more info)
Add migration script for new collection content
Fix some issues with person names when exporting
Fix issue of loading collection content using eval()
Merge branch 'master' into tests
Almost done with tests for main content
Fix several issues after running test script
Merge branch 'tests'
Increase time for of sorting test case
Reduce waiting time of getting PDF test script
Update search indexes. Improve searching performance.
Change the way of getting similar articles
Implement cache to similar articles
Delete the stupid line in getting similar
Merge branch 'master' into logging