## What's Changed
- Added JsonType - json object types enumeration
- Added Json.Json() - constructor
- Added Json.JsonF() - static constructor (from file)
- Added Json.Type.get() - property
- Added JsonObject.GetType()
- Added JsonArray.GetType()
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- Deprecated JsonObject.IsNull()
- Deprecated JsonObject.SetNull()
- Deprecated JsonArray.SetNull()
- Deprecated JsonArray.PushNull()
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- Changed JsonObject.Set(const char[], Json) - second arg can be `NULL` to store `JSON_NULL`
- Changed JsonArray.Set(const int, Json) - second arg can be `NULL` to store `JSON_NULL`
- Changed JsonArray.Push(Json) - first arg can be `NULL` to store `JSON_NULL`
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- Renamed JSONObjectKeys -> JsonKeys type
- Renamed JSONObjectKeys.ReadKey() -> JsonKeys.Next() - iterator method
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- Removed JSONObject.JSONObject() - constructor, use new Json("{}") instead
- Removed JSONArray.JSONArray() - constructor, use new Json("[]") instead
- Removed JSONArray.IsNull() - :/