veyron2: merge Runtime interfaces into veyron2.Runtime

Move all of the Runtime interfaces from veyron2/subdirectories into
veyron2/model.go to bring all of the documentation into one place
and see if this simplifies the overall code structure. This also
made it easy to get rid of the mgmt subdirectories in veyron2 and
the associated runtime.

    Change-Id: I95f9fe4b2c72c737c7255b08ce1cfe1cbbace8a7

Change-Id: I602d4436f2c9690963d60bfce303465ebb36f64a
20 files changed
tree: ce5754ce74d5b18add25169a2a3270597f554830
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/