Remove generated minified resources by mvn clean command.

Follow-up to #131 and #132

@see https://maven.apache.org/plugins/maven-clean-plugin/examples/delete_additional_files.html

No functional changes.

Author: php-coder

pom.xml

@@ -45,6 +45,7 @@
 
 		<compiler.plugin.version>3.5.1</compiler.plugin.version>
 		<resources.plugin.version>2.7</resources.plugin.version>
+		<clean.plugin.version>3.0.0</clean.plugin.version>
 		<war.plugin.version>2.6</war.plugin.version>
 		<native2ascii.plugin.version>1.0-beta-1</native2ascii.plugin.version>
 		<surefire.plugin.version>2.19.1</surefire.plugin.version>
@@ -541,6 +542,29 @@
 				<version>${resources.plugin.version}</version>
 			</plugin>
 
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-clean-plugin</artifactId>
+				<version>${clean.plugin.version}</version>
+				<configuration>
+					<!-- Remove minified resources -->
+					<filesets>
+						<fileset>
+							<directory>src/main/webapp/WEB-INF/static/styles</directory>
+							<includes>
+								<include>*.min.css</include>
+							</includes>
+						</fileset>
+						<fileset>
+							<directory>src/main/javascript</directory>
+							<includes>
+								<include>**/*.min.js</include>
+							</includes>
+						</fileset>
+					</filesets>
+				</configuration>
+			</plugin>
+			
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-war-plugin</artifactId>