If any request returns `{'success': False}` or throws an exception, `Api.Execute` will not exit the execution, will log and return the result. This change will enable re-try logic.
- Refactor to simplify `quantconnect.api.Api` class. Adds `Execute` method that accepts a bolean to distinguish a `POST` from a `GET` request.
In the previous version, some methods were using the `params` argument instead of `data` in the `POST` case which threw an exception for big json objects.
- Adds option to save logs and backtest report to disk.
- Adds `Result` class to optionally convert the json objects into `pandas.DataFrame` when getting backtest or live results
- Subversion bump
Aaron Janeiro Stone