Validate date type
Recognize year only date links correctly
Introduce SchemaConverter class
Minor refactoring
Finish date convertion
Add boolean convertion
Add text convertion
Add number conversion
Add number conversion
Add url conversion
Add thing conversion
Support custom datatype conversion and add ISBN converter
Support list value
Add itemtype param to Property's constructor
Merge branch 'master' into type-aware-schema
Make it to pass all tests
Render structured-data box correctly
Remove unused file