update build to Eclipse Tycho 0.16

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.projectplan/.project b/org.eclipse.vex.projectplan/.project
index 0fd3034..fa707da 100644
--- a/org.eclipse.vex.projectplan/.project
+++ b/org.eclipse.vex.projectplan/.project
@@ -6,6 +6,11 @@
 	</projects>

 	<buildSpec>

 		<buildCommand>

+			<name>org.eclipse.jdt.core.javabuilder</name>

+			<arguments>

+			</arguments>

+		</buildCommand>

+		<buildCommand>

 			<name>org.eclipse.pde.ManifestBuilder</name>

 			<arguments>

 			</arguments>

@@ -15,8 +20,15 @@
 			<arguments>

 			</arguments>

 		</buildCommand>

+		<buildCommand>

+			<name>org.eclipse.m2e.core.maven2Builder</name>

+			<arguments>

+			</arguments>

+		</buildCommand>

 	</buildSpec>

 	<natures>

+		<nature>org.eclipse.m2e.core.maven2Nature</nature>

 		<nature>org.eclipse.pde.PluginNature</nature>

+		<nature>org.eclipse.jdt.core.javanature</nature>

 	</natures>

 </projectDescription>