misc/proxy-setup.bash: exporting NO_PROXY env var in /etc/profile

If this variable is not set with at least 127.0.0.1, when the git hook
for deployment (on the bare repository) tries to call tsuru deploy
endpoint the proxy will not allow it to continue.
misc/docker-setup: uncommenting pkg installation for those who are on AWS

If the user running the script is not on AWS it'll be presented with an
extra and probably useless package, but for most of our installations
this is useful.