allow compression in the write_to function

[ron819]

I'm using the library as follows:

storage.Bucket('bucket_name').item(path).write_to(df['results'].to_json(), 'application/json')

It would be nice if the write_to function will also have the ability to do compression.
For example data frame has the ability to :

        df.to_csv(path_or_buf=file_name, index=False, encoding='utf-8',
                  compression='gzip',
                  quoting=QUOTE_NONNUMERIC)

However this requires me to save the file locally and only then upload it (same for csv and json)
So as I said, it would be nice if compression='gzip' would be av liable in the write_to function