A missing echo line was causing incomplete HTML to be returned.

- get the json data
- reformat it to match the TimelineJS format
- create a timeline instance

- Refactor to provide function to create an end date
- The end date currently does not work and is commented out, along with various logs for debugging
- If the record has a file, it is returned in the json with the image key. Take what is there and include it in the slide.

- Remove the old code that created the Simile timeline
- Remove old center date code
- Make the title of each record's slide a link to the Omeka record

…ing multiple timelines on a single page

The theme-config setting for loading javascripts locally has changed from InternalJavascripts to InternalAssets, to recognize that people will want to use this for css files and such as well. I updated the plugin to accept the old or new syntax.

…nes libraries.