fixes gh-45

If the prefix is set we also set configPath=<prefix> in the
instance metadata, so config clients can pick it up and add it
to the home page URL.

Fixes gh-64, fixes gh-65

Added LoadBalancerClient.reconstructURI to take an URI with the service as hostname and inject a real host and port.
Added tests for RibbonInterceptor and RibbonLoadBalancerClient.

fixes gh-37

The problem manifests itself as errors in the Eureka server
log (gh-47), but originates in the client because it is sending
requests to /eureka/apps/{NAME}/{ID} with the wrong ID. The
InstanceInfo has an ID that is derived (for preference) from
the EurekaInstanceConfig.dataCenterInfo, so that's the best
way to fix it.

See gh-63, Fixes gh-47

fixes gh-50

fixes gh-53

fixes gh-58

fixes gh-40

fixes gh-57

and how to use it. In particular you can't use it before the
ApplicationContext is past phase=0 of lifecycle startup.

Fixes gh-48

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

Fixes gh-52

Most browsers support <base href="..."> these days and there
was one already in statut.ftl (but not in navbar). Added a test
that asserts the css is loadable as well.

Fixes gh-55

Removed old zuul module.

fixes gh-14

move SpringClientFactory bean creation to RibbonAutoConfiguration where it should have been in the first place.

fixes gh-35

Fixes gh-49

fixes #16

To enable EUreka-first bootstrap.

See gh-42

Fixes gh-42