(Break point) Refactor class properties

Merge pull request #7 from compropago/staging

Staging

(LTS) Update and add services

• Feature: Add field availability to Provider object
• Feature: Add Multi currency support
• Feature: Separate Rest logic into Http and Request classes
• Added: Added field currency for listProviders method
• Deprecated: Removed field auth for listProviders method
• Deprecated: Suport for API 1.0
• Deprecated: Abstract model clases

Primera versión

• Feature: Creación de órdenes
• Feature: Verificación de cargos
• Feature: Envío de información Sms
• Feature: Obtención de proveedores disponibles
• Feature: CRUD de Webhooks
• Feature: Normalización de información
• Require: Java 1.8.x
• Require: Google Gson 2.7