This reverts merge request !166

JSON should now be better so that the UI can handle it in task async
handler.

JSON should now be better so that the UI can handle it in task async
handler.

This reverts commit b3fb1a16

It introduced changes which cause issues described in
purescript-gargantext#571

This commits changes the `PhyloData` data structure to
include a proper `GraphData` in the `pd_data` field. The
`GraphData` is almost complete, but the `objects` field needs
to be further refined from a generic JSON `Value` to proper
Haskell types.

This reverts commit a444cb30.

This reverts commit 22b14f56.