made DropBox app key configurable via a JVM option; per #462.
Added internal validation for FITS field values that are supposed to parse as valid Floats in the dataverse metadtata block.
(otherwise the dataset field value validator throws an error and prevents the file from being added).
Add Citation File download capability

Also minor template fixes (blank out default if user deselects inherit
and default is inherited) Compare metadata block before allowing
inheritance of templates.
removed some experimental code from the dataset page.
Added proper "not found" and "service unavailable" http status codes on failures.
Fix End Note XML if Dataset has not been published
Suppress "Inherit Templates" check box when metadata block between parent and child DVs differ
Merge branch 'master' of https://github.com/IQSS/dataverse

Conflicts:
	src/main/webapp/dataset.xhtml
	src/main/webapp/dataverse.xhtml