Changes from version 0.3

oaf-result-0.4.xsd

- Added contributor (all)
- Added license (all)
- Added instance collectedfrom (all)
- Added instance dateofacceptance (all)
- Added attributes of the journal element:
    - iss: issue
	- vol: volume
	- sp: start page
	- ep: end page
- Added documentationUrl (sw)
- Added codeRepositoryUrl (sw)
- Added programmingLanguage (sw)
- added type (orp + sw)

oaf-common-0.4.xsd:
- Added openairecompatibility field in links to datasources

oaf-project-0.4.xsd:
- Element 'class' of the project funding tree is now optional
- funding hierarchy (i.e. 'funding_level_X' elements) is now optional: fundingtree may only refer to the funder.