jersey-hmac-auth-0.16

Added support for Jersey2. Thanks @l0s!

Minor:

• java 8 compatibility at build/test time
• include user agent in CLI tool

jersey-hmac-auth-0.15

• Reduced the minimum required Java version to 1.6 for both the server and client
• Added more configuration options to the CLI tool, hurl, allowing easier access to providing API and secret keys