Basic decoding of GVariant values (except for Variant).

Change-Id: I43e495a57c1f045b91ce01d89f2010f61b5fb8f5
diff --git a/.mvn/maven.config b/.mvn/maven.config
new file mode 100644
index 0000000..f8d5e4d
--- /dev/null
+++ b/.mvn/maven.config
@@ -0,0 +1 @@
+-Drevision=0.1.0-SNAPSHOT