Pushed dataset information down from study summary into study details.
Fixed the URL links for study details and trait observation details.
Autowire httpServletRequest at the instance level rather than method level.
Added method to get a list of study (Nurseries and Trials) summaries.
Removed Fieldbook resource. Moved workbook GET method to StudyResource. Nurseries and Trials operations will be exposed using the generic Study concept via the StudyResource.