Improved configuration from ENV, cleaned up timeline filter methods

to be more readable, add extra logging to process feed service

config/initializers/neography.rb

@@ -1,5 +1,5 @@
 Neography.configure do |config|
   config.protocol             = "http"
-  config.server               = ENV['NEO4J_HOST'] || 'localhost'
-  config.port                 = ENV['NEO4J_PORT'] || 7474
+  config.server               = ENV.fetch('NEO4J_HOST') { 'localhost' }
+  config.port                 = ENV.fetch('NEO4J_PORT') { 7474 }
 end