Bean instantiation ordering was causing external (user-supplied)
filter beans to replace the defaults, not append to them. Separating
out the autowired map of beans into a spearate class was enough to
fix it.

Fixes gh-78

fixes gh-73

Also adds support for context paths in physical URL mappings, e.g.

zuul.route.http\://localhost\:8081/app=/stores/**

will result in a proxy forward of /stores/foo to
http://localhost:8081/app/stores/foo

Fixes gh-73

E.g.

zuul:
  route:
    testclient: /testing123/**         # service mapping
    http://localhost:8081: /stores/**  # physical mapping

You can bind to a Map<String,String> with application.yml, so there's
no need to work so hard to extract the zuul routes.

User can now list routes with /zuul/routes and reset with a
POST.

Fixes gh-75

Fire InstanceRegisterEvent after eureka registration, then components can listen for that event and safely access DiscoveryClient.

This allows mappings to be at the root and not have to be prefixed.  It also allows mappings to fall through to other handler mappings.  Patterns are now Ant-style via AntPathMatcher.

fixes gh-72

fixes gh-67

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-40

fixes gh-57

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

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