Add reference to manylinux1 wheels (#312)
Add reference to manylinux1 wheels (#312)

and put binary wheel installation instructions first.
reaperhulk/pynacl,pyca/pynacl,pyca/pynacl,pyca/pynacl,lmctv/pynacl,lmctv/pynacl,reaperhulk/pynacl,lmctv/pynacl,lmctv/pynacl,pyca/pynacl,reaperhulk/pynacl,pyca/pynacl,reaperhulk/pynacl,reaperhulk/pynacl,lmctv/pynacl