Javadocs and README.

Change-Id: I10d7cb87ca22475f3f73fb25acd813aa1f8d2bb8
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 8880c0b..403cf1f 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -1,5 +1,11 @@
+/**
+ * Provides a parser for the <a href="https://docs.gtk.org/glib/struct.Variant.html">GVariant</a>
+ * serialization format.
+ *
+ * <p>The {@link eu.mulk.jgvariant.core} package contains the {@link eu.mulk.jgvariant.core.Value}
+ * and {@link eu.mulk.jgvariant.core.Decoder} types. which form the foundation of this library.
+ */
 module eu.mulk.jgvariant.core {
-  requires java.base;
   requires com.google.errorprone.annotations;
   requires org.jetbrains.annotations;