TEST: Fix integration tests to run with nose.
Test streamline test also fails on Linux.
Don't exit if a test fails.

Instead we re-raise the exception when the event loop ends.  This plays
nicely when there are tests that fail with nose.  In addition, one test
seems to fail on win32 and we disable it for now.
Merge pull request #115 from prabhuramachandran/nose_integration_tests

LGTM. Merging.
First simple step to change pipeline topology using input connection
Remove print statements
Refactor actor component to new pipeline topology.
Merge branch 'new-pipeline' of github.com:dmsurti/mayavi into new-pipeline