This cause the error "Mismatched anonymous define" when loading the
bundle in Plone.

The original reason for adding `start.frag` was to wrap the bundle in a
closure to not pollute the global namespace (e.g. overriding global
`define` and `require` with Almond`s versions) and secondarily to allow
people to load the bundle via require.js.

The second usecase should now probably be done via a shim in the
require.js config.