0.0.3

This release changes the SDK minimum API level to 16 (Android version 4.1).

Full Changelog

Merged pull requests:

• Add Travis badge to README file #60 (SandroMachado)
• Add TLSv1.2 support for older Android versions #59 (SandroMachado)
• Update transaction model with account information #58 (SandroMachado)
• Update README.md #57 (SandroMachado)