CLI arguments
Some resources might not have a prefLabel
Added field "uri"
Initial import to solr
Extracted SKOS properties
Added related labels
Added related URIs
Refactoring + JavaDoc
Updated method signature (protected for tests; no need to throws exception
Added test import file
Added note to readme on how to run the command
Merge branch 'master' into import-skos-to-solr

* master:
  Added maven compiler target @davbo
Argparse: use filetype
Cleanup imports, use java 7 style diamond inference, removed deprecated javadoc
Improved resources tests
Merge pull request #1 from ox-it/import-skos-to-solr

CLI import SKOS RDF file to search index
Merge branch 'master' into skos-search

* master:
  Cleanup imports, use java 7 style diamond inference, removed deprecated javadoc
  Argparse: use filetype
  Added note to readme on how to run the command
  Added test import file
  Updated method signature (protected for tests; no need to throws exception
  Refactoring + JavaDoc
  Added related URIs
  Added related labels
  Extracted SKOS properties
  Initial import to solr
  Added field "uri"
  Some resources might not have a prefLabel
  CLI arguments
Use Optional (Guava)