add comments to ant file

opale_to_basex/opale_to_basex.ant

 <project name="opale_to_basex" default="clean">
     <property file="build.properties"/>
 	
-    <echo message="To be implemented..."/>
-
     <target name="AllFiles">
     	<delete>
     		<fileset dir="${outputPath}" />
     	</delete>
-    
-
-    <copy todir="${inputOpaleToHdoc}">
+		
+		<!-- Copy input files into input folder of project opale_to_hdoc and execute it -->
+		<copy todir="${inputOpaleToHdoc}">
 			<fileset dir="${inputPath}"/>
 		</copy>
-	<ant antfile="../opale_to_hdoc/opale_to_hdoc.ant" inheritAll="false"/>	
+		<ant antfile="../opale_to_hdoc/opale_to_hdoc.ant" inheritAll="false"/>	
 
-	<copy todir="${inputHdocToBasex}">
+		<!-- Copy input files into input folder of project hdoc_to_basex and execute it -->
+		<copy todir="${inputHdocToBasex}">
 			<fileset dir="${outputOpaleToHdoc}"/>
 		</copy>
-
-	<ant antfile="../hdoc_to_basex/hdoc_to_basex.ant" inheritAll="false"/>
-	<copy todir="${outputPath}" >
+		<ant antfile="../hdoc_to_basex/hdoc_to_basex.ant" inheritAll="false"/>
+		
+		<!-- copy output files into output of this projet -->
+		<copy todir="${outputPath}" >
 			<fileset dir="${outputHdocToBasex}"/>
 		</copy>
-		</target>
-
-
-
+	
+	</target>
 
-		<target name="clean" depends="AllFiles">         
 		
-		<!-- -->
+	<target name="clean" depends="AllFiles">         
+		<!-- clean temp files -->
 		<delete includeemptydirs="true" verbose="true">
 			<fileset dir="${inputOpaleToHdoc}"> 
 				 <include name="*.scar"/>
 			</fileset>
 		</delete>
+		
 		<delete includeemptydirs="true" verbose="true">
 			<fileset dir="${outputOpaleToHdoc}"> 
 				 <include name="*.hdoc"/>
 			</fileset>
 		</delete>
+		
 		<delete includeemptydirs="true" verbose="true">
 			<fileset dir="${inputHdocToBasex}">
 				 <include name="*.hdoc"/>
 			</fileset>
 		</delete>
+		
 		<delete includeemptydirs="true" verbose="true">
 			<fileset dir="${outputHdocToBasex}"/> 
-		</delete>
-		
+		</delete>	
 	</target> 	
 
 </project>