Adds a simple image GET test for issue #83.
Switches service logging output to global trace functions, removing spurrious output for service to service calls. Fixes #83.
Adds s2s test to basic setup tests.
Removes deprecated parameter.
Adds missing test comments.
Fixes parameter trace (simplified).
Simplifies S2S test.
Merge pull request #85 from robotpony/issue-83-content-rendering-in-debug-mode

Fixes service debugging (no longer injected into output)