Fix gh-pages URL in README.
Add workaround for frequent Travis build failures during Cython compilation.
Merge pull request #216 from enthought/fix/travis-cython-failures

Add workaround for frequent Travis build failures during Cython compilation.
Merge remote-tracking branch 'origin/master' into fix/docs-url
Merge pull request #215 from enthought/fix/docs-url

Fix gh-pages URL in README.
Merge remote-tracking branch 'origin/master' into fix/compliant-dev-versions