Setup for openstack-doc-tools gating

Add files to allow us gating via:
tox -e checkbuild
tox -e checkniceness
etc

Enhance .gitignore to ignore files used by gating and by more
editors.

Change-Id: Id33d04f734d438d01dd5bbd784abaa213de5dbc9
Merge "Setup for openstack-doc-tools gating"
Fix object-api wadl for use in the dev guide

Partial-Bug: #1187119

Change-Id: I8feeb1dbc6ed9a25be1fc42cbfc79af2ab29bbcd
author: diane fleming
Merge "Fix object-api wadl for use in the dev guide"
Fix object-api wadl

Partial-Bug: #1187119

Change-Id: Ic979d39b2aaa9fb34037d03af4668a9decc7ae57
author: diane fleming