tools/gostatic: init

This adds Bazel/hscloud integration to gostatic, via gostatic_tarball.

A sample is provided in //tools/gostatic/example, it can be built using:

    bazel build //tools/gostatic/example

The resulting tarball can then be extracted and viewed in a web
browser.

Change-Id: Idf8d4a8e0ee3a5ae07f7449a25909478c2d8b105
diff --git a/tools/gostatic/example/src/static/style.css b/tools/gostatic/example/src/static/style.css
new file mode 100644
index 0000000..9f89f00
--- /dev/null
+++ b/tools/gostatic/example/src/static/style.css
@@ -0,0 +1 @@
+/* put your style rules here */