enable test output temporarily for Travis
Revert "enable test output temporarily for Travis"
This reverts commit a797ca75e8c7a48e57f988360e5d57dbb497a6fb.
Resolves#527
implement HttpFunction
add headers processing
Some refactoring [WIP]
Add invoker integration test
Make test classes nested within test.
Add sample and refdoc
Resolves#468