Allow access solving the bug when we try to connect to the server.
Added local environment variables loading
Add postman collection file with all the example request for the api v1
Merge branch 'feature/allowAccess' into develop

* feature/allowAccess:
  Allow access solving the bug when we try to connect to the server.
Merge pull request #27 from coopdevs/feature/manage-environment-variables

Added local environment variables loading
Added oat gem
Added User and Group serializers
Added serializers to Users and Groups controllers
Added some minor improvement
Merge pull request #28 from coopdevs/feature/json-api-serializers

JSON API serializers
Upgraded rails-api gem and added session management
Removed rails-api gem and bring sessions to life
Fixed some issues to get sessions to actually work
Removed unused ApiKey model
Added HttpOnly session
Moved cookies secret key to environment variables
Set groups controller failing specs as pending
Removed wrong private method
Added SessionsController specs
Added fake cookies secret key for tests