renamed Runner to RawRunner ready for DockerRunner
made a start at refactoring test/installation/one-language-checker to know about new manifest.json keys and docker-runner
s/avatar/animal/ on home page tips
Paas->Runner interaction refactoring so both runners use same api
updated RawRunner tests
started resurrecting integration tests
resurrecting more integration tests
resurrecting last integration test
tweaked front page dialog text
added java1.8 dockerfile