refs #7126 allow usage of resources per company
specs for use resource rules
Add hipchat notification settings to travis.yml
turn allow_resources to use_resource on company
Suppress too verbose db:schema:load in ci:build rake task
integration specs for use resources
use resources integration specs updated
Add application config for travis
Add enable_per_project_billing field to companies.
Enable billing Checkbox on company edit.
Only show billing related things if enabled at the company level

  Affected areas:
  * Billing tab in the top menu (+ restrict access to billing)
  * Services under Admin panel
  * Service under Task atttributes
  * Suppress Billing under Project show and edit
Adjust billable logic.
Hungarian localization.
Rename company enable_per_project_billing attribute to use_billing (migration change also!).
Added spec for User#can_use_billing?
Added spec for Project#billing_enabled?