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+1. Specify enough of memory arrangement and core functions that I can build something that can start, read (parse) a stream, allocate some memory, print what it's got, and exit.
+2. Build the above.
+3. Fully specify eval/apply, lambda, and def; make a decision whether to eval compiled code, interpreted code, or (at this stage) both. In the long term I want to eval compiled code only, but that requires working out how to generate the right code!
+4. Build enough of the system that I can write and evaluate new functions.
+5. Build enough of the system that two users can log in simultaneously with different identities, so as to be able to test user separation and privacy, but also sharing.
+6. Try seriously to get compilation working.
+7. Get system persistence working.
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