Nicer formatting to README
Remove ant-junit from modeled dependencies, as it is causing ant to appear twice in the classpath
First stab at authentication.

* RedditClient chooses the appropriate endpoint (www.reddit.com or ssl.reddit.com
  depending on scheme)
* Auth results are inside yet *another* container object, so now we have a
  JsonContainer (looks like {"json":{"data":{}}})
* All errors during authentication are thrown as RedditAuthenticationException
  Note that this is somewhat wrong behavior; RATELIMIT errors from reddit should
  be a different kind of exception (and, theoretically, should be handled within
  the library.)   Perhaps we should have an optional parameter asking whether to
  block?
* Integration tests work individually, especially when you include some wait time
  between running them.  Running as a group, reddit decides that it wants to
  return a RATELIMIT message.  Unfortunately, the actual message returned does not
  seem to contain a machine-readable field with the next appropriate time to make
  a call.  Rather, it returns a human-readable message (something like "you are
  doing that too much. try again in 3 minutes.").