#158 is_pik added

* adds model and form mixin for PIK
* integrates mixins for compensation, ema and ecoaccount
* adds migration files
* extends API
* extends API test data
* adds is_xy fields to compensation, ema and ecoaccount reports
* adds is_pik information to detail views
* adds/updates translations

api/tests/v1/update/ecoaccount_update_put_body.json

@@ -45,6 +45,7 @@
     "properties": {
         "title": "TEST_account_CHANGED",
         "deductable_surface": "100000.0",
+        "is_pik": true,
         "responsible": {
             "conservation_office": null,
             "conservation_file_number": "123-TEST",