Strip prefix in info rebinding
Add self-bootstrap feature for embedded config server

Also switch to use SpringApplicationEnvironmentRepository
in "native" profile (it's more useful as a "getting started"
tool).

Fixes gh-21, fixes gh-33
Add some docs for config server
Extract config server properties to Java bean

ConfigServerProperties is now used to store global properties
for the config server (like the path prefix and bootstrap flag)
under spring.cloud.config.server.* so git specific ones have
been pushed down to spring.cloud.config.server.git.* (similarly
for git->native).

At the same time introduce spring.cloud.config.server.defaultLabel
for the deafult git label (defaults to "master").

Fixes gh-28
Add fail fast flag for config client if local decryption fails

On the server we choose not to fail if a property cannot be decrypted (clients
might be relying on the other values to be able to deal with the failure).

Fixes gh-31