[Keyedge] Ready to go public!

[dayeol]

We're going to include this in v0.4 release at the end of October.
Please test thoroughly as we discussed offline.
Also try to write a brief user documentation (how to use) once you've done all clean-ups and tests.
We use sphinx + read the docs for the documentation:
https://github.com/keystone-enclave/keystone/tree/master/docs

Development documentation is also good to have, but given that this is an initial version and things will change, it'd be good to have it later.