Added tooltip feature for hierarchical facets. Use setTooltip method to provide a custom function for generating the tooltip.
Closes #78
Added support for hasChild field in JSTree client implementation and switched the property to Boolean for ease of use.
Closes #96
Added content type of application/json to hierarchical method results.
Client now checks to see if the content is of string before attempting to parse it. jQuery should auto-parse json, however, so this is just a check in case it doesn't.
Closes #97