Moved gpg plugin into its own profile

pom.xml

@@ -90,28 +90,43 @@
 			<plugin>
         		<groupId>org.apache.maven.plugins</groupId>
         		<artifactId>maven-release-plugin</artifactId>
-        		<version>2.4.2</version>
         		<configuration>
           			<tagNameFormat>v@{project.version}-beta</tagNameFormat>
         		</configuration>
       		</plugin>
-      		<plugin>
-        		<groupId>org.apache.maven.plugins</groupId>
-        		<artifactId>maven-gpg-plugin</artifactId>
-        		<version>1.4</version>
-        		<executions>
-          			<execution>
-            			<id>sign-artifacts</id>
-            			<phase>verify</phase>
-            			<goals>
-              				<goal>sign</goal>
-            			</goals>
-          			</execution>
-        		</executions>
-      		</plugin>
 		</plugins>
 	</build>
 
+	<profiles>
+		<profile>
+			<id>release-sign-artifacts</id>
+			<activation>
+				<property>
+					<name>performRelease</name>
+					<value>true</value>
+				</property>
+			</activation>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-gpg-plugin</artifactId>
+						<version>1.4</version>
+						<executions>
+							<execution>
+								<id>sign-artifacts</id>
+								<phase>verify</phase>
+								<goals>
+									<goal>sign</goal>
+								</goals>
+							</execution>
+						</executions>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+	</profiles>
+
 	<dependencies>
 		<dependency>
 			<groupId>org.slf4j</groupId>