Add doc/README.me (it's a start)

Signed-off-by: David Scott <dave.scott@citrix.com>
Add a list of features

Signed-off-by: David Scott <dave.scott@citrix.com>
Add a host architecture picture

Signed-off-by: David Scott <dave.scott@citrix.com>
Update host architecture diagram

Signed-off-by: David Scott <dave.scott@citrix.com>
docs/features: fix a few typos

Signed-off-by: David Scott <dave.scott@citrix.com>
Add an 'inside xenopsd' architecture diagram

Signed-off-by: David Scott <dave.scott@citrix.com>
Add initial docs/ table of contents

Signed-off-by: David Scott <dave.scott@citrix.com>
Restructure the doc into architecture/designs/features/walk-throughs and futures

- architecture: high-level stuff
- designs: low-level important detail
- features: what they are and how they work
- walk-throughs: tracing through interesting operations
- futures: what we should do later

Signed-off-by: David Scott <dave.scott@citrix.com>
Flesh out the architecture page a bit more

Signed-off-by: David Scott <dave.scott@citrix.com>
Render the architecture diagrams via github pages

Signed-off-by: David Scott <dave.scott@citrix.com>
Correct the diagram links

Signed-off-by: David Scott <dave.scott@citrix.com>
Complete the architecture page.

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #140 from djs55/lots-of-docs

Update the docs