Documentation does not mention swig prerequisite for RoBO

[RadixSeven]

The RoBO Installation Documentation does not list swig as something you need to install. However, installation fails (because of pyrfr) without swig.

I couldn't just submit a pull request because I couldn't find the documentation in the repository.

The lines

RoBO uses the Gaussian processes library george . In order to use this library make sure the libeigen is installed:
sudo apt-get install libeigen3-dev
then change into the new directory:

Should read

RoBO uses the Gaussian processes library george and the random forests library pyrfr. In order to use these libraries make sure libeigen and swig are installed:

sudo apt-get install libeigen3-dev swig

then change into the new directory: