Add rake task to create non-digest assets symlinks

Based on
rails/sprockets-rails#49 (comment)

Without this, a lot of things just don't work (including static pages).

crowbar_framework/lib/tasks/assets.rake

@@ -0,0 +1,31 @@
+#
+# Copyright 2015, SUSE LINUX Products GmbH
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+namespace :assets do 
+  task non_digested: :environment do
+    assets = Dir.glob(File.join(Rails.root, 'public/assets/**/*'))
+    regex = /(-{1}[a-z0-9]{32}*\.{1}){1}/
+    assets.each do |file|
+      next if File.directory?(file) || file !~ regex
+
+      source = file.split('/')
+      source.push(source.pop.gsub(regex, '.'))
+
+      non_digested = File.join(source)
+      FileUtils.symlink(file, non_digested, :force => true)
+    end
+  end
+end