ObservationDataSchema for eplevikler and ObservationTimeSeries

Changes include:

• migrations for database changes
• new service, bean, domain class
• relation between Observation and its corresponding ObservationTimeSeries (can be null)
• new field 'source' for Observation + timeseries, to be able to see whether registered in app or web
• observation data schema for eplevikler

pom.xml

@@ -209,7 +209,7 @@
         <dependency>
             <groupId>no.nibio.vips</groupId>
             <artifactId>VIPSCommon</artifactId>
-            <version>2.1.1-SNAPSHOT</version>
+            <version>2.1.0</version>
         </dependency>
         <dependency>
             <groupId>javax</groupId>