updated readme
added model,migration controller for contact_function
added model,migration controller for conact_coverages
added model,migration controller for conact_company_coverage
added model,migration controller for event_attendees
added relationships to locaion model
added model,controller, and migration for event
added relationship to event attendees model
added model,controller, and migration for contact
renamed event_attendees migrations to be singular
minor tweaks to schema for contact
added migration, model, controller for institution
added polymorphic notes table migration,model,controller
minor changes to models for consistency