Add client code to parse OBA REST API responses

[barbeau]

Given the number of methods and fields of the OBA REST API, the shortest path by far for this is to port the client code from OBA Android to normal Java. This involves changing from the Android Uri object to Java's URI, etc.

I've done this in the obaClient branch, as code integrated into this project: https://github.com/OneBusAway/onebusaway-alexa/tree/obaClient

I'm currently in the process of transferring it to its own repo to exist as a separate library that can be used in this and other Java-based OBA applications.

TODO:

• [x] Pull client code into separate project/repo
• [ ] Port remaining Android IO tests to Java (as possible)
• [x] Publish artifacts to OBA Maven repo
• [x] Add JAR to this project

[barbeau]

Here's the new home of the Java client library: https://github.com/OneBusAway/onebusaway-client-library

[barbeau]

It turns out porting the OBA Android client tests to normal Java is a little more complicated that I anticipated. I was still able to add the library JAR, though (by skipping the tests), and the main library seems to work as intended. So, I'm calling this issue closed, and I'm tracking the issue with the tests in a new ticket on the oba-client-library repo: https://github.com/OneBusAway/onebusaway-client-library/issues/1