added gem devise to gemfile and bundled
added devise models and did mminor configuration
added users seeds and migrated
added seed data for contact company coverages and migrated
reworked schema and migrations to enable company table addtion
added companies model
added companies controller
updated models for relationship to new companies table
updated event contact and eventattendee models so hasmany through relation works
fixed through relationships in other models
removed through relationships in contact, institution, contact_coverages... as they were unnecessary
added logic to user model that identifies all contacts that follow the users company, and all institutions that are associated with those contacts