Add archival notice

Doc bugfixes, a bit more detail around mailboxes.

Attempt to fix standalone monitor compilation.

Cleaned up thread metadata management.

Cleaned up enclave creation.

More cleanup.

More DRAM region tests.

More tests and bugfixes for DRAM regions.

Test and bugfixes for DRAM region management code.

Tests and bugfixes for DRAM region geometry.

Massive comment-out to make things compile.

Still cleaning up the API.

More cleanup.

WiP: more work on API cleaning.

Mailbox API.