Add rel field to links display

Currently the "rel" keys from the links list are not displayed, so
it's not that clear which link refers to what unless you're familiar
with heat.  So add a suffix which mentions the rel so e.g users can
see "nested" there and tell the link refers to a nested stack.

Change-Id: I5abe7f7b51c290bd9d8daaccb7f9a842af898f58
Revert "Add keystone v3 auth support"

This reverts commit a98c1f3617604c4871263ff9cc986b27f302ef46.
The new usage of session doesn't work with resources or events.

Conflicts:
	heatclient/tests/test_shell.py
Closes-Bug: #1349467

Change-Id: Ib5b0db81454abe647aca6461dd7bd5f197267fb8
Merge "Add rel field to links display"