NVDB QGIS Plugin

Pull request #52: NVDBDOVUTV-378 import api url lenke

Merge in NVDBDOV/nvdb-qgis-plugin from NVDBDOVUTV-378-import-api-url-lenke to Dev

* commit '54d60982be50820cf405b41853ef982a9fda74f1':
  NVDBDOVUTV-378: fixed faulty test url
  NVDBDOVUTV-378: added a method import_handle_egenskap_verdi_textornum so that we the feature works with number and text input. Also changed name to avansert filtrering, and changed some button controls
  NVDBDOVUTV-378: removed prints
  NVDBDOVUTV-378: made AreaGeoDataParser update the env. And added ux improvements
  NVDBDOVUTV-378: removed print
  NVDBDOVUTV-378: changed name from bruk api lenke to avansert filtrering
  NVDBDOVUTV-378: changed name from importer med lenke to avansert filtrering
  NVDBDOVUTV-378: added icon for advanced filtering tab
  NVDBDOVUTV-378: fixed test for filter input
  NVDBDOVUTV-378: removed prints
  NVDBDOVUTV-378: removed self.source_data = nvdbFagdata(nvdbId) in get_import_data_fromMoreWindow()
  NVDBDOVUTV-378: fixed filter input to take in everything except type and kartutsnitt
  NVDBDOVUTV-378: changed import from vegobjekt parser, to advanced filtering
  NVDBDOVUTV-378: fixed split_egenskap_into_array method. Now can add several egenskaper and several relasjoner
  NVDBDOVUTV-378: fixed test case for filter_input
  NVDBDOVUTV-378: big changes, added a lot of button control, and fixed a lot of bugs
  NVDBDOVUTV-378: big changes, a lot of bugfixing and changing the way we format the queries. Now if is more safe. Multiple egenskaper works in relasjon, but not overlapp
  NVDBDOVUTV-378: fixed some of the tests, after doing bugfixing on the vegobjekt_parser, and source_more_window
  NVDBDOVUTV-378: fixed some of the testing url's