Add annotate gem for models and Gemfile

Remove Rails 3 attr accessible from models (#1691)

added a test that searches for missing translations. Added specific error messages for model validations. Added some devise controlled error messages to pot/po files DMPRoadmap/roadmap#236

finished up answer and note unit tests

unit tests for notes and answers. addded new validator to check whether the question's template matches the plans template

resolved merge conflicts

began changing models to reflect the new model names and relationships, additionally deleting some old/unused models which no longer apply in the new schema.

added migration to add foreign keys. Also needed to remove the temporary models, and update existing models to reflect the new relationships

updated code to write user-generated content (answers/notes)

updated models for data migration