* Cleans up some warnings
* Adds new test for bug https://github.com/stleary/JSON-java/issues/332
* Adds some resource handling for string writers using pre-java1.7
support. I know StringWriters don't need a close method called, but the
tests should still handle their resources properly.
Both toMap() and toList() return deep copies, which are also mutable. That is, any changes to the JSONObject or JSONArray do not affect the newly create Map or List, and vice-versa. The resulting objects can be altered.
Explicitly test variations of toString() and write() for different indent levels, and different method overloads. Also create some tests for the new toList() and toMap() methods for coverage improvements to JSONArray and JSONObject.
