[coverage-html] Generate HTML code coverage report and rsync it out of travis.
[coverage-html] Use PHP version number in folder name.
[coverage-html] Add latest symlink.
[coverage-html] Add code coverage report link to readme.
[coverage-html] Put fingerprint of RSA host key into variable.
[coverage-html] Add comment to expect installation.
Merge pull request #57 from bantu/coverage-html

Travis CI: Generate code coverage HTML and persistently store it.