/**
 * @class PlayAudio
 * @extends jibo.bt.Behavior
 * @memberof jibo.bt.behaviors
 * @description Plays the audio specified by `audioPath`. Succeeds when the audio file is finished playing.
 * @param {Object} options See {@link jibo.bt.Behavior|Behavior} for all options.
 * @param {String} options.audioPath The path to any audo file format supported by HTML5 Audio. This behaviuor assumes `${project}/audio`
 *                           is the root for all the audio files.
 * @param {Boolean} options.cache=true `true` to cache the audio. `false` to play once and destroy.
 */