Add pre-commit hook: run 'make tests'
 Fix entity members access
Add eunit to occi_renderer_plain
occi parser: separate term from attribute_name_attr
Update mime type for json rendering to application/occi+json (JSON rendering draft, April 29, 2013)
Add compiler conditions for tests.
Fix compilation
Allow parser to parse multiple headers
Fix scanner (support attribute name)
Add tests for scanner