v1.2.0

Added new methods to Filter for setting/getting the available options:

• getOptions(): returns all the options in the filter.
• setOptions(opts): merges the passed opts dictionary with the filter options.

Updated Filter events, including a new event:

• selectionUpdatedEvent: triggered when the filter selection has been updated.
• optionsUpdatedEvent: triggered when the filter options have been updated.

Refactored Values events to be consistent with Filter:

• valuesChangedEvent -> valuesUpdatedEvent.

Added more convenience methods to Response class:

• getResults(): returns the results from the response.
• getTotalResults(): returns the total number of results in a search.
• getTime(): returns the time spent running the query.
• getAggregates(): returns any aggregates run with the search.