initial oauth support.
Merge branch 'master' into nodes-using-oauth
add resources and make oauth adjustments.
add nodes.conf to packaging.
oauth enabled by default with generated key & secret.
nodes user guide; 2.3 release notes.
clearer description.
docstring.
override/defaulting logic encapsulated in node conf.
update unit tests.
Shift grouping of nodes packages to comps.xml instead of requires: in packages.
update nodes user-guide.
more nodes user-guides.
Cannot depend on consumer configuration or certificate.
get rid of [main] section of nodes.conf.
get rid of node_id() in resources.
fix schema.
Merge branch 'master' into nodes-using-oauth

Conflicts:
	nodes/child/pulp_node/handlers/model.py
	nodes/test/unit/test_plugins.py
Merge branch 'master' into nodes-using-oauth
rework model to work with resources; simplify everything.