Added comments & updated code structure.

Change-Id: I2ff7adb2954b87e8345a6e0619b14614883c4200
diff --git a/core/pom.xml b/core/pom.xml
index 869823c..dfd73fe 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -3,12 +3,12 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.ids_mannheim.korap</groupId>
 	<artifactId>Kustvakt-core</artifactId>
-	<version>0.61.4</version>
+	<version>0.61.5</version>
 
 	<properties>
 		<java.version>1.8</java.version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<spring.version>5.1.1.RELEASE</spring.version>
+		<spring.version>5.1.2.RELEASE</spring.version>
 		<jersey.version>1.19.4</jersey.version>
 		<jetty.version>9.4.12.v20180830</jetty.version>
 		<hibernate.version>5.3.7.Final</hibernate.version>
@@ -153,6 +153,12 @@
 			<artifactId>json-smart</artifactId>
 			<version>1.0.9</version>
 		</dependency>
+		<!-- JSON support in Jersey -->
+		<dependency>
+			<groupId>com.fasterxml.jackson.jaxrs</groupId>
+			<artifactId>jackson-jaxrs-json-provider</artifactId>
+			<version>[2.9.5,)</version>
+		</dependency>
 
 		<!-- Flyway -->
 		<dependency>
@@ -335,7 +341,7 @@
 			<artifactId>spring-tx</artifactId>
 			<version>${spring.version}</version>
 		</dependency>
-		<dependency>
+		<!-- <dependency>
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-core</artifactId>
 			<version>${spring.version}</version>
@@ -344,7 +350,7 @@
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-web</artifactId>
 			<version>${spring.version}</version>
-		</dependency>
+		</dependency> -->
 		<!-- EM: done -->
 		<dependency>
 			<groupId>org.springframework</groupId>