Start adding a VM.start walkthrough

Signed-off-by: David Scott <dave.scott@citrix.com>
Add more text to the VM.start walk-through

Signed-off-by: David Scott <dave.scott@citrix.com>
Flesh out VM.start a lot more

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #141 from djs55/lots-of-docs

Add VM.start walkthrough