Update README.md

Patch up the Travis build links.
Merge pull request #475 from knappe/patch-1

Update README.md for updated travis build links [ci-skip]
Commit changes to compiled JS files

It appears that the coffee compilier has changed the format of the JS
code that is produced from the build process. To avoid having PRs that
reference JS files that haven't substantially changed, commit the
changes here as once commit.
Update README

Poltergeist no longer defaults to port 44678, it simply runs on an open
available port.
Handle 'status:fail' responses from PhantomJS land

When a server is not running at the specified host:port or
if there is a DNS failure, PhantomJS will respond with
status=fail, no response code, and a minimal HTML document.
We should not return that document, but throw an exception instead.