Do not copy dataapps from /etc/profile.d

dataapps.sh already exists in .../bin/dataapps.sh, so there's no need
to symlink it from /etc/profile.d
don't check certs on github downloads

The github certificate is invalid or self-signed. Wget will not
download from github.com without the --no-check-cert flag.
cd back to bin/setup after building nginx on mac

return to the bin/setup directory so cwd is the same regardless of
uname.
Merge branch 'master' of github.com:amoore/Wing
Merge pull request #2 from amoore/master

fixes to installation process