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Merge branch 'jekyll' of https://github.com/enviroCar/enviroCar-server into jekyll

* 'jekyll' of https://github.com/enviroCar/enviroCar-server:
  Merged resources and entities.
  group example added for jekyll
  measurement examples added for jekyll
  phenomenon examples added for jekyll
  sensor exmaples added for jekyll
  track examples for jekyll
  Documentation of a single track