Fixed Travis CI build problem (#20)

* Update .travis.yml

* Fixing travis-ci build

* Update .travis.yml

Author: anthonygauthier

pom.xml

@@ -127,6 +127,35 @@
 			<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
 		</repository>
 	</distributionManagement>
+	<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>1.5</version>
+						<executions>
+							<execution>
+								<id>sign-artifacts</id>
+								<phase>verify</phase>
+								<goals>
+									<goal>sign</goal>
+								</goals>
+							</execution>
+						</executions>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+	</profiles>
 	<build>
 		<plugins>
 			<plugin>
@@ -166,20 +195,6 @@
 					</execution>
 				</executions>
 			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-gpg-plugin</artifactId>
-				<version>1.5</version>
-				<executions>
-					<execution>
-						<id>sign-artifacts</id>
-						<phase>verify</phase>
-						<goals>
-							<goal>sign</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
 			<plugin>
 				<artifactId>maven-surefire-plugin</artifactId>
 				<version>2.19</version>