fix twarc-csv library example
@@ -77,9 +77,13 @@ If you have a bunch of data, and want a DataFrame:
```
from twarc_csv import DataFrameConverter
+# Default options for Dataframe converter
+converter = DataFrameConverter()
+
+# this can be a list or generator of individual tweets or pages or results.
json_objects = [...]
-df = DataFrameConverter.process(json_objects)
+df = converter.process(json_objects)
```
This doesn't save any files, and converts everything in memory.
