function composeHandlerChain(handlers, options) {
    var chain = new Chain(options);
    if (_.isArray(handlers)) {
        handlers = _.flattenDeep(handlers);
        handlers.forEach(function(handler) {
            chain.add(handler);
        });
    } else {
        chain.add(handlers);
    }

    return function handlerChain(req, resp, callback) {
        chain.run(req, resp, callback);
    };
}
Builds a function with the signature of a handler
function(req,resp,callback).
which internally executes the passed in array of handler function as a chain.

@param {Array} [handlers] - handlers Array of
function(req,resp,callback) handlers.
@param {Object} [options] - options Optional option object that is
passed to Chain.
@returns {Function} Handler function that executes the handler chain when run