add install instructions for required software to readme (#27)
add install instructions for required software to readme (#27)

Co-authored-by: stephenR <0cce3206b4c7c668b3a0e8775ce9606c62701d78@googlemail.com>

google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf,google/google-ctf