Release v1.0.4

• Refactor BillingContext class

Release v1.0.3

• Added new attributes for subscriptions

Release v1.0.2

• Test coverage 100%
• Adding workaround to get all item SKU details, one request is limited by 20 items
• Fix test static response not working

Release v1.0.1

• Fix Purchase flow not being cleared in a specific case
• Catch NPE in some cases for Meizu M3s devices
• Added cancel method
• Added support for RxJava 2.x

Release v1.0.0

Updating README