ssh_alt.py / decrease # of ssh roundtrips
add seealso to developing_inventory
fixed a reference to AWX site
Merge pull request #5298 from sa2ajj/minor-docsite-fixes

Minor docsite fixes
Update README.md
Update CONTRIBUTING.md
Merge pull request #5247 from jeromew/ansible_ssh_alt

ssh_alt.py / decrease # of ssh roundtrips