Fixed merge conflicts API/I18n -> Rails 4.2

Removed all accepts_nested_attributes_for for belongs_to associations because they were creating circular calls in ActiveRecord.

localization further work, including dropdown initial work

DMPonline4 - RAILS 4.0 (#4) ...

Merging the initial DMPOnline4 codebase into Roadmap

DMPonline4, this code was designed and implemented by the Digital
Curation Centre (DCC)
DMPonline runs in Ruby 2.1 and Rails 4.0, there is a mysql database.