Allow for saving of components and features at the same time

[jonashaag]

Currently to obtain a components and a features file (pickle and csv files) you have to run the command line or the Python API twice, which recomputes the components.

Would be nice if there was support for saving both at the same time.

[rlenain]

That's a great suggestion. Thanks very much, we will consider incorporating this into a future version of Surfboard.