update build to Eclipse Tycho 0.16

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex/.gitignore b/org.eclipse.vex/.gitignore
index ea8c4bf..eb5a316 100644
--- a/org.eclipse.vex/.gitignore
+++ b/org.eclipse.vex/.gitignore
@@ -1 +1 @@
-/target
+target