Merged functionality of "RiftHandler" class into "RiftRegistry" class
Moved the "Location" class
Why the RiftRegistry couples the Rift ID to the Rift **location** and
the PocketRegistry couples the Pocket ID to the actual Pocket
**instance**:
-Each Rift is a Tile-Entity, which means that it has its infromation can
be stored using the Tile-Entitiy's information saving system.
-Each Pocket is barely more than an information storage container, which
depends on having an external information saving system, which the
PocketRegistry provides for it.
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