fixing an issue with the test under Cython 0.19 + added more tests
Fix link from Travis CI build badge to point to the actual build page
Merge branch 'master' into enh_allow_cython
install cython on the travis slave
fix typo
Merge pull request #74 from enthought/fix/travis-ci-link

Fix link from Travis CI build badge to point to the actual build page
Merge pull request #75 from enthought/enh_allow_cython

Improve tests for cythonization support
Add a global trait change event tracer.
Merge branch 'master' into traits-notifiers