Add method
Update slide rendering
Update test
Update test
Add tests
Update example
Update example

- add textarea element for input json
Update example
Add jsonlint for input json in example
Update example
Update dist
Merge branch 'add-slide' into develop

* add-slide:
  Update dist
  Update example
  Add jsonlint for input json in example
  Update example
  Update example
  Update example
  Add tests
  Update test
  Update test
  Update slide rendering
  Add method