Working on a backend integration for AN.
Added API method to retrieve the document content.
Added document content as a DTO and added service. Remove content related calls from DocumentService and moved them into DocumentContentService.
Moved additional method to the backend services.
Cleanup: removed unused variables.
Added .gitignore files.
Added missing licence.txt.
Preparations to release version nsesa-server-api 0.2.
Setting next release to 0.3-SNAPSHOT
Added better clarification for the use of amendmentContainerID and revisionID.
Added version support.
Added exceptions to the API module.
Added exceptions to the signature of saving amendments.
Added possibility to update the status of an amendment (will invoke workflow), added checked exceptions when resources are not found or stale revisions are being sent.
Renamed amendable widget reference DTO to be more in line with the other DTOs.
Renamed amendable widget reference DTO to be more in line with the other DTOs, added RevisionDTO.
Preparing for the next release.
Bumped to next snapshot versions.
Merge branch 'release_0.3'

Conflicts:
	pom.xml
Added method to retrieve Persons based on their last name.