A slightly better README

README.md

@@ -1,2 +1,21 @@
-## GoJava - 
+## GoJava - Java bindings to Go packages
 
+GoJava uses a [forked version of gomobile](https://github.com/sridharv/gomobile-java) to generate Java bindings to Go packages.
+The same set of types are supported. Details on how the binding works can be found [here](https://godoc.org/golang.org/x/mobile/cmd/gobind).
+
+### Usage
+
+```
+    gojava build [-o <jar>] [<pkg1>, [<pkg2>...]]
+   
+    This generates a jar containing Java bindings to the specified Go packages.
+   
+    -o string
+         Path to the generated jar file (default "libgojava.jar")
+```
+
+You can include the generated jar in your build using the build tool of your choice.
+The jar contains a native library (built for the build platform) which is loaded automatically.
+Cross platform builds are not currently supported.
+
+NOTE: This has only been tested on an OSX developer machine and not in production.