The KGE Archive needs to handle *huge* graph file sets

[RichardBruskiewich]

The system needs to handle sizable graphs, but Relay may test this assumption. Real world graph sizes:

• Node normalization KG: 23.18 GB
• RTX2: 106.13 GB
• Semmeddb: ~ 12 GB
• SRI Reference KG 0.2: ~ 12 GB
• New Robokop: 112.22 GB

[RichardBruskiewich]

Some general progress already made: multi-part uploads, etc.

We probably should implement the direct URL file transfers (Issue #15) plus programmatic and CLI modes (Issue #16; with streaming) to facilitate the transfer of huge files.

Note that the KGEA has background uploading of files. What if a huge file upload needs to be cancelled (issue #37)? What should happen?