remove static route redirects / bump static to top level (#1299)

* add another favicon rule

* catch only top-level dataset names

* add config flag to disable redirects

* remove static redirect, point all links to top-level /static

* remove extraneous argument

* remove httpd redirect

server/eb/.ebextensions/static_rewrite.config

@@ -1,11 +0,0 @@
-# Configure URL rewriting from /<dataset>/static/* to /static/*
-files:
-  "/etc/httpd/conf.d/static_rewrite.conf":
-    mode: "000644"
-    owner: root
-    group: root
-    content: |
-        RewriteEngine On
-        RewriteRule "^(.*)/static/(.*)" "/static/$2" [PT]
-        RewriteRule "^/favicon.png" "/static/img/favicon.png" [PT]
-