new file:   .travis.yml
- Integrating with travis.org
modified:   setup.py
- Adding support for nose tests.
modified:   tests/mock/expected_ansi
modified:   tests/test_logging.py
modified:   tests/test_tree_output.py
- Updated and modified tests for newest fixes in HierarchicalOutput and for log
  handler.
modified:   tree_output/__init__.py
- Changed output behaviour. If closed==True we also reduce the level by -1.
  Hierarchy level is never less the 0.