WL-2909 Don't require component of all for export.

When exporting the components in XML format if you wanted all components for a year you would have to specify a component ID of all, now if you want all components you can just omit that part of the URL.

We still support the old URLs containing "all" as the component.
Merge pull request #110 from ox-it/WL-2909

WL-2909 Don't require component of all for export.