Include stable docs, use Apache URLs

Change-Id: Iadb5074e130d4a21b2af123aa405e9fc21a14aed
Reviewed-on: https://asterix-gerrit.ics.uci.edu/519
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/content/docs/0.8.7-incubating/css/site.css b/content/docs/0.8.7-incubating/css/site.css
new file mode 100644
index 0000000..055e7e2
--- /dev/null
+++ b/content/docs/0.8.7-incubating/css/site.css
@@ -0,0 +1 @@
+/* You can override this file with your own styles */
\ No newline at end of file