dataset classes are now in the dataset package
feature-MICASERVER-8 - added stats aggregation
Merge pull request #75 from kazoompa/feature-MICASERVER-8

feature-MICASERVER-8 - added stats aggregation
MICASERVER-58 Dataset index added.
MICASERVER-58 Dataset events added: trigger indexing
MICASERVER-58 Published variables facet search added.
MICASERVER-58 DatasetVariables are returned by Dataset resources, to be consistent with variable search
DatasetVariable.toString() added
MICASERVER-58 Added Study and DatasetVariable extensions to QueryResultDto message
MICASERVER-58 DatasetVariable resources added, based on the aggregated variable identifier
Utility method added for creating a localized string from a attribute
MICASERVER-58 Ids added to dataset variable result dto
MICASERVER-58 Variable type has Dataset type as parent in ES
MICASERVER-58 Delete by query the variables of a dataset