Add AutoClass C as a dependency

[rpetit3]

Hi Pierre!

I followed the demo (successfully!) and it includes a few steps to install AutoClass C.

wget https://ti.arc.nasa.gov/m/project/autoclass/autoclass-c-3-3-6.tar.gz
tar zxvf autoclass-c-3-3-6.tar.gz
rm -f autoclass-c-3-3-6.tar.gz
export PATH=$PATH:$(pwd)/autoclass-c

# if you use a 64-bit operating system,
# you also need to install the standard 32-bit C libraries:
# sudo apt-get install -y libc6-i386

I would imagine some users might over look the Docs and demo. Considering this, It might be useful to also include these steps under Installation and dependencies in the README.

Cheers,
Robert

[pierrepo]

Thanks @rpetit3 That is a very good idea.