Merge branch 'Observation' into 'develop'

pom.xml

.../vips/logic/controller/servlet/ObservationController.java

.../nibio/vips/logic/controller/session/ObservationBean.java

src/main/java/no/nibio/vips/logic/entity/Observation.java

src/main/java/no/nibio/vips/logic/entity/PolygonService.java

.../no/nibio/vips/logic/entity/rest/ObservationListItem.java

.../no/nibio/vips/logic/entity/rest/PointMappingRequest.java

...no/nibio/vips/logic/entity/rest/PointMappingResponse.java

...java/no/nibio/vips/logic/entity/rest/ReferencedPoint.java

.../java/no/nibio/vips/logic/service/ObservationService.java

src/main/java/no/nibio/vips/logic/util/GISEntityUtil.java

src/main/resources/db/migration/V5__Add_PolygonService.sql

src/main/webapp/formdefinitions/observationForm.json

src/main/webapp/js/validateForm.js

src/main/webapp/templates/observationForm.ftl

...nibio/vips/logic/entity/rest/PointMappingRequestTest.java