Release 0.6.0

1. place api key as higher priority over usage of api secret and access token (breaking change).
2. simplify null checking in api config, and allow keys with string value "null" (breaking change)
3. migrated dependency to realm 2.2.1 (now you can use annotationProcessor)

Disqus Sign-in Support

1. updated: resolved sign-in issue on Lollipop or above
2. updated: correctly interpret and intercept the Disqus sign-in response page
3. updated: resolved rendering issues related to previous version of ezwebview
4. updated: support the ezwebview interface up to 1.4.2