Stack instance identifier property

The identifier property formats the stack name and ID for
REST API request paths.

This has the following consequences for each action method:
- get, same behaviour but using the identifier property
- delete, using the full identifier avoids one http redirect
- update, this method was non-functional before this change, and is
  now fixed

Change-Id: Ib2b12826243e25772acccb8ca56039e54d3857d5
Support --version for heatclient

Closes-Bug: #1220524
Change-Id: Id78f7c7c78d31c0126b43f7a846f02f2542b0b7c
Add handler for heatclient.common.http

If no handler is found, add StreamHandler to LOG

Closes-Bug: #1220532
Change-Id: I32d541d242845b7311fd6810a5e87f07fafd8efd
Merge "Stack instance identifier property"
Merge "Add handler for heatclient.common.http"