on_success = function (data, status, xhr) {
            that.events.trigger('kernel_created.Kernel', {kernel: that});
            that._kernel_created(data);
            if (success) {
                success(data, status, xhr);
            }
        }
POST /api/kernels

Start a new kernel.

In general this shouldn't be used -- the kernel should be
started through the session API. If you use this function and
are also using the session API then your session and kernel
WILL be out of sync!

@function start
@param params - parameters to include in the query string
@param {function} [success] - function executed on ajax success
@param {function} [error] - functon executed on ajax error