Initial add of Entd readme.

At the moment it's only got info on how to get the TPM and PKCS11 emulator running on a dev box, so that you don't need to mess around with a gadget for unit tests.

In the future there should be some more info, like how to build entd, or something.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3014006
1 file changed