change default API rev from v1beta14 to v1beta15
add v1beta15 discovery doc
make changes to google_cloud lib to support machine type as a zonal resource
(required by v1beta15 change)
additional changes for v1beta15 handling of machine-types
Merge branch 'master' of https://github.com/GoogleCloudPlatform/compute-appengine-demo-suite-python into v1beta15
fixed line wrap
update settings.json to use latest centos image
disabled static checked-in discovery docs
fix typo in constant name
revert change from fractalfix branch (i.e. introduced a fix from
another branch by accident, will pick that up when I submit PR from
that branch)
update centos version to latest image
Merge pull request #8 from GoogleCloudPlatform/v1beta15

upgrade quick start demo to use v1beta15
Merge branch 'master' of https://github.com/GoogleCloudPlatform/compute-appengine-demo-suite-python into fractalfix

Conflicts:
	demo-suite/settings.json