Feature: Logging (closes issue #10)

1. CoreModule.feature renamed to RuntimeModule.feature
2. Added complete Logging.feature with initial step definitions
3. Removed driftwood
save point: partial solution for issue #12
issue #12: tests pass but code coverage could improve
more work to increase coverage for issue #12
more work for issue #12
Logging: added logging module and updated references
issue #34: completed xml code docs for existing types
Merge branch 'feature/issue-34-logging' into dev