switch to assertj
Merge pull request #428 from adriancole/assertj

switch to assertj
Update RxJava to 0.17.1.

* Note that we now do not return the response if the subscriber is unsubscribed.
Merge pull request #437 from niqo01/master

Update RxJava to 0.17.1.
fix #423: Use ErrorHandler to coerce error responses during async invocations.
Merge pull request #439 from adriancole/adrian.fix-423

Use ErrorHandler to coerce error responses during async invocations.
Allow overriding 'Content-Type' header.

This 'Request' objects passed to a client will now have their header list pre-populated with 'Content-Type' and 'Content-Length' headers set. Previously the 'Client' implementations were responsibile for setting this data.
Merge pull request #441 from square/jw/override-content-type

Allow overriding 'Content-Type' header.
Remove unused jarjar plugin declaration.
Merge pull request #443 from square/jw/what-were-you-thinking-george-lucas

Remove unused jarjar plugin declaration.
Prepare version 1.5.0.
Use latest release plugin.
Changes to make JDK 8 doclint happy.
[maven-release-plugin] prepare release parent-1.5.0
[maven-release-plugin] prepare for next development iteration
Merge remote-tracking branch 'upstream/master'

Merging in Retrofit v1.5.0