update PAML test result generator to support PAML 4.7
add PAML 4.7 test results
Merge remote-tracking branch 'origin/master'
Remove Jython from TravisCI configuration (old hack broke)

See discussion on https://github.com/travis-ci/travis-cookbooks/issues/64
While Hong Xu has updated his trick, the workaround is more complex to
implement (especially with multiple Python platforms) and not as simple
to interpret on the TravisCI webpage.