Merge branch 'master' into eclipsed

* master:
  Default properties
  Removed SparseString
  Added Dataset Descriptors and updated SGSV upload
  Renamed DataSet to Dataset
  SGSV runner
  Moved methods to DataService, added spring @Cache annotations
  mvn 1.7
  Descriptors, datasets
  reCAPTCHA in .properties
  Service impls
  Data models extend BusinessModel
  Data model
  Deleted ACL
  Resolve warnings
  Copied code from crophub-core