merged final_schema changes into visibility

fixed merge conflicts

fixed merge conflicts in branding.yml and schema.rb

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

extracted plan visibility work out of dev branch for PR to DCC

changed schema to be correct for data migration

updated the migration to set the customizing organisation properly

updated schema to reflect final set of migrations after going through process from scratch

fixed template versioning and customisers in migration

updated foreign keys null refreence ripper to remove things from a join table

re-aranged migrations so that big_flags for orgs happen before foreign keys

re-aranged migraitons so that bit_flags for roles happens before foreign keys

added role scrubbing to foreign keys migration

final tweks to ensure all migrations happen together

replaced plan roles with bitflags

removed organisation_types and replaced with bitflags

replaces Organisation. with Org. in all files

updated data migration to not over-write organisation_id for templates with nil

updated removing_intermediary_tables to remove some other unused tables

updated schema

added migration to make a many to one relationship guidances > guidance_groups, additionally, removed the project groups and projects tables

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

updated migration to remove all new_table_name structures

init commit of migration to remove old tables and rename intermediary ones

additionally stores old project_id for new_plans

changed the way answers are selected in migration

updated prefetching, relocated index definition, and removed debug for migration

wrapped migration in transaction for performance

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

removed early cutting for template project and relpaced with better selection