Moved orcid_id from users table to user_identifiers. Added option_based flag to question_formats. switched Object.const_defined to table_exists checks in db migrations because rails loads references to classes on demand so the objects are likely not defined when the migrations run. safer to check for the underlying table's existence

resolved merge conflicts

Added checks to migration files that manipulate data to make sure that the model they are attempting to access is defined in the current codebase

added checks in migration code where we try to manipulate data belonging to a table that no longer exists in the current codebase

resolved merge conflicts

merged final_schema changes into visibility

Merge branch 'DigitalCurationCentre-final_schema' into final_schema

added in new files for public plans page. added code coverage to .gitignore

cleaned up tests