v0.8.1 - Android & Gradle support

Full Changelog

Implemented enhancements:

• Travis.CI support #4

Fixed bugs:

• Gradle build should be able to build library without Android SDK installed #46
• Token authentication "Request mac doesn't match" #40
• Re-enable temporarily disabled test #31
• Travis.CI support #4

Closed issues:

• Re-enable temporarily disabled test #32
• Additional encoding / decoding tests #1

Merged pull requests:

• Async http #59 (paddybyers)
• changes to run provided RestInit test case #58 (gorodechnyj)
• Allow connection manager thread to exit when closed or failed, and re… #50 (paddybyers)
• Add script for running tests in CI #49 (lmars)
• Publish implicit attach #48 (paddybyers)
• Make inclusion of android-test project conditional on whether or not … #47 (paddybyers)
• RSC1 and RSC2 - initialisation and default logging behaviour #43 (iliyakostadinov)
• Key length case and ably common #35 (mattheworiordan)