#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/create/compensation_create_post_body.json

@@ -6,6 +6,7 @@
         "title": "Test_compensation",
         "is_cef": false,
         "is_coherence_keeping": false,
+        "is_pik": false,
         "intervention": "MUST_BE_SET_IN_TEST",
         "before_states": [
         ],