Added ActiveRecord associations and models

* added 4 models
  * certificate
  * certification
  * company
  * industry
* added 4 migrations
 * companies
 * certificates
 * certifications
 * industries
Renamed migration folder to migrate. Ran Migrations. Scraped data from FTF and FTUSA to seed database with companies and certifications.

* db/migration => db/migrate
* ran db:migrate
* created Certificate methods to scrape data from FTF and FTUSA
* added config/ftf_members.html - html file converted from PDF of FTF data
* seeded database with scraped info
added .ds_store to fix merge
Merge branch 'chore/seed_database_fairtrade'

* ran "git add .DS_STORE"
* fixed merge conflict maybe?