serializer service rather than separate object mapper instances.
Integrated spawner functions. Moved from using resource resolver
directly to using XnatResourceLocator.

Added DicomSCPApi to use Spring REST controller instead of restlet, updated DicomSCPManager to support required calls. Refactored XNAT support into abstract base class. Updated XnatWebAppInitializer to use plugin instead of module.

Added support for multipart form resolver, as well as the multipart configuration for the DispatcherServlet.

Moved SwaggerConfig operations into WebConfig and fixed paths on Swagger resource handlers. Moved UsersApi and related classes into users subpackage. Fixed timeout cookie. Moved InstanceSettings.xml to InstanceSettings.xml.sample and put InstanceSettings.xml into the .gitignore file. Updated some dependency versions.

Added session timeout back to web.xml, removed from session event publisher. Added back in missing Spring Security filter chain from move to initializer. Added missing Xalan dependency for security. Added @PreDestroy method for DICOM SCP manager.

Moved initializer and root config classes to initialization package to remove change of double-scanning. Fixed a few other items.