Rails 4 upgrade
* update a lot of gems
* update application.rb for rails 4
* added config.eager_load to the environment files
* updated conditions hashes on has_many relations to use lambdas
* updated schema to rails 4 format
* .scoped has become .all
* implicit table joins need .references
* get rid of whiny nils
* secret_token is now secret_key_base

Fix additional test troubles caused by Rails 4 upgrade
* Fix weird nag in SectionArranger group by statement somehow caused by rails 4
* Whitelist all accessable 'user' fields in devise 3's param sanitizer
* Omit ActiveRecord::SchemaMigration from seeds_spec leak checking
* Fix test failure caused by an as_json now returning strings instead of symbols
Clean up Guardfile