Custom Request Function

by default the library supports `JQuery`, `vue-resource` and `axios` as ajax libraries.

If you wish to use a different library, or somehow alter the request (e.g add auth headers, or manipulate the data) use the `requestFunction` option. E.g:

options: {
requestFunction(data) {
return axios.get(this.url, {
params: data
}).catch(function (e) {
this.dispatch('error', e);

When using a custom request function, the `url` prop is not required.