It still isn't actually used (and would only be used on a link to
a non-existent JSP page), but at least it can render now.

See gh-628

Fixes gh-628

see https://github.com/Netflix/Hystrix/pull/927

https://github.com/Netflix/Hystrix/pull/921

Also brings in patches to the hystrix dashboard.

fixes gh-465

fixes gh-300

This commit resolves an issue where some versions of Cloud Foundry are
setting the 'Connection: close' HTTP header in the Hystrix stream
response, which causes the dashboard to not display the stream data.

See https://github.com/cloudfoundry/gorouter/issues/71

fixes gh-204

When running from /hystrix or from / (with a forward) the
webjars and the monitor endpoint need to be resolvable, so
we need to use the FTL macros again.

Fixes gh-193

Fixes gh-153

fixes gh-153

 fixes gh-147

Overrides Spring Boot's FreeMarkerAutoConfiguration to prefer using a
SpringTemplateLoader instead of the file system. This corrects an issue
where Spring Boot may use an empty 'templates' file resource to resolve
templates instead of the packaged Hystrix classpath templates.

When creating a new project with Spring initializer, an empty
'templates' resource directory is automatically added to the new
project, causing a scenario where this issue may occur.

I didn't see a way to do this without dynamic rendering, so
now we have a freemarker dependency (not huge I guess).

Fixes gh-51