initial commit for organizations
add tests and func for validating code
add schema after migrations
make corrections according to comments
fixing comments after 76143d1
changes to @betasve pr to comply with latest requirments of client

based on PT story https://www.pivotaltracker.com/story/show/77974308
- Removed Region from
  - migration
  - active admin
  - rspec tests
  - cucumber tests

- Remove sequential_id migration completely

- Removed link to organisation on active admin menu
  - urls still work when typed in manually
  - delete is disabled in active admin
  - changed cucumber test to verify absence of organisation link in menu
fix coding style violations and remove reference to region column

part of PT story https://www.pivotaltracker.com/story/show/77974308
tidy up as part of code review
introduced rspec check suggested by @nik which highlighted problem with validations

added more rspec checks and modified validations to ensure passing
Merge pull request #36 from PurityControl/org_crud

Organizations crud