Update logging pep

Revisions based on latest design decisions:

- stdout/stderr from carts/apps
- syslog
- rsyslog plugin
- openshift-logger helper
- node apache access log metadata
Revise spec for platform component accuracy
Merge pull request #1 from ironcladlou/logging

Revise spec for platform component accuracy
Remove log rotation from PEP scope
Expand backwards compatibility section
Merge pull request #2 from ironcladlou/logging

Logging PEP revisions
Merge pull request #28 from ncdc/logging

Update logging pep