Factorize category lookup in occi_store.
occi_category_mgr must not be used anymore to check categories.
In particular, mixins and user mixins handling is now uniform
application/json: parse inline links
application/xml: fix link rendering
application/xml: parsing and rendering of inline links ok
Add tests for HTTP GET
Fix tests for HTTP GET
Update changelog for 0.3
Use version from git
Update changelog