Added support for initializing site URL from request URL and servlet context. Finished StringUtils migration. Added XapiRestController handling.

Merge commit '37317f9f'

# Conflicts:
#	.gitignore
#	build.gradle
#	src/main/java/org/nrg/xdat/om/base/BaseXnatDicomseries.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatExperimentdata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatImageassessordata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatImagescandata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatImagesessiondata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatProjectdata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatPublicationresource.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatPvisitdata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatReconstructedimagedata.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatResource.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatResourcecatalog.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatResourceseries.java
#	src/main/java/org/nrg/xdat/om/base/BaseXnatSubjectdata.java

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

Fixed function name.

deployToTomcat task. Added some common ignore templates.

Adding files for Admin UI spawning: tabs.js for overall rendering of tabbed interfaces, panel.js for rendering individual panel elements, jquery.dataAttr.js for reconciling jQuery's .data object and [data-] element attributes, table.js for (somewhat) easier rendering of table data from an array (rows) of arrays (cells); refactored spawn.js to use best option as the main function; added methods for chainable element spawner.

Made data source and Hibernate configurations populate from services.properties. Moved ORM configuration into DatabaseConfig and removed XML configuration file.

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.

XNAT-4140 - Refactored scriptEditor.js and added hooks to Scrips.vm to allow loading another script in the currently open editor, which will allow a different version of the script being edited to be loaded on-the-fly.

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.

Performance improvements to Spawner™ spawn.js and $.spawn.js with new methods - spawn.element() and spawn.plus(); Chainable element generator - XNAT.element().div().p('Content'); Specific methods for individual elements - XNAT.element.tag('Content'); These need more testing before widespread usage.

Downgraded Jackson version to 2.6.5 to address compatibility issue with Spring 4.2.4.RELEASE (Jackson 2.7 is not supported until Spring 4.3).

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.