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* Update exts services for API-X demo

- Update extension definition to comply with current ontology
- Expose as resource-scoped in most cases by default
- Add auto registering of extensions
- Use apix headers rather than http paths for identity of Fedora objects

Mostly involves allowing both path-based and api-x header-based routing in
-exts.  The existing integration tests use path-based paradigm.

Simplify docs

This removes some redundant information that is already out of date.

See merge request !81

add missing ldpath extension

Forgot to add this...

See merge request !82

Adds customized LDPath service

Resolves: #24

See merge request !80

Resolves: #24

remove the ldcache code

The code in fcrepo-camel-toolbox/fcrepo-ldpath is better and we should start using that instead.

See merge request !79

upgrade to fcrepo-camel/4.5.0

There is more that can be done w/r/t using the new features of 4.5.0, but this is a start.

Resolves #21 

See merge request !78

update readme

See merge request !76

remove last vestige of maven

One last file I forgot to remove...

See merge request !75

Set the GitHub pages URI explicitly

Small change to make things easier during a release

See merge request !77