update Eclipse project

eclipse_project_setup/.project

 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
   <name>imagej-elphel</name>
-	<comment></comment>
-	<projects>
-		<project>metadata-extractor</project>
-	</projects>
+  <comment>A Maven project implementing imagej-elphel plugin. NO_M2ECLIPSE_SUPPORT: Project files created with the maven-eclipse-plugin are not supported in M2Eclipse.</comment>
+  <projects/>
   <buildSpec>
     <buildCommand>
       <name>org.eclipse.jdt.core.javabuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.m2e.core.maven2Builder</name>
-			<arguments>
-			</arguments>
     </buildCommand>
   </buildSpec>
   <natures>
     <nature>org.eclipse.jdt.core.javanature</nature>
-		<nature>org.eclipse.m2e.core.maven2Nature</nature>
   </natures>
 </projectDescription>
\ No newline at end of file