Chau Cuenta corriente (operarios) + Update

- Update PaperTrail
- Update Capistrano
Test User's fixture simplified, Test helpers and syntaxis enhanced.

-Test user's fixtures replaced by generic operator.
-create_generic_user helper method added and login method upgraded.
-Syntaxis upgraded to rails 4.
-user_id removed from attr_readonly (print model).
Mejora en test_helper
Merge branch 'test-refactor'

Conflicts:
	test/controllers/articles_controller_test.rb
	test/controllers/customers_controller_test.rb
	test/controllers/documents_controller_test.rb
	test/controllers/prints_controller_test.rb
	test/controllers/tags_controller_test.rb
	test/controllers/users_controller_test.rb
	test/models/print_job_type_test.rb
Update de gemas