update status in readme

Author: Ryan Bottriell

README.md

@@ -8,3 +8,5 @@ This port is currently targeting three.js r85
 ## Status
 
 This library is in early stages of development, with only some minor core libraries working.
+
+Currently the main math and core types are defined on some level, allowing a simple open gl window to render a color. The current goal is to flesh out the [simple cube example](examples/simple_cube.go) so that the basic geometry rendering works.