Added gitignore for IntelliJ
Squashed 'src/org/json/' content from commit b883a84

git-subtree-dir: src/org/json
git-subtree-split: b883a848a6af94db57e1b8223ab9b6d96707a9e7
Merge commit '2a1bd9df8b4f26fdc004e342ed76115cc41885a3' as 'src/org/json'
Ported pretty much all the json stuff over to org.json instead org.json.simple

Also fixed a couple of 'typos?' in the json files, turns out org.json.simple
actually parsed invalid json? You might have to replace a couple of get....
operations though, as I pretty much just went for optString(..., null) for
fields that were not present in the sample json files.