Ability for PUT and PATCH requests

• Ability for PUT and PATCH requests
• Invoice number, custom and soft descriptor
• Order API and tests, more Authorization tests
• remove references to sdk-packages
• patch for retrieving paid invoices
• Shipping address docs patch
• Remove @array annotation
• Validate return cancel url
• type hinting, comment cleaning, and getters and setters for Shipping

v0.8.0

• Invoicing API support added

v0.7.1

• Added support for Reauthorization

v0.7.0

• Added support for Auth and Capture APIs
• Types modified to match the API Spec
• Updated SDK to use namespace supported core library