v1.0.0-beta03

-fixed error parsing when fetching private subreddit
-fixed crash on empty array return using first()
-fixed minor crashes on parsing
-added base SubredditData interface to Subreddit and PrivateSubreddit
-added more tests on more cases
-added ability to disable legacy response encoding
-added ability to upload media showing as i.redd.it and v.redd.it
-added RedditorSubreddit
-added ability to see a redditor's ModeratedSubs
-bumped android tools to 4.0.0
-bumped moshi to 1.9.3