Correctly pass HTTPS = on to PHP only when SSL is used.

Close #15.
Nginx config now includes app-specific config snippets.

Closes #16.
Nginx version: 1.2.7.

Closes #14.
$PATH is now set via .profile.d mechanism.

Closes #9.
Fixed missing ; in nginx.conf.
Don't bailout when conf/nginx.d/ does not exist in app.
In nginx, $https cannot be redefined. Changed to use $my_https instead.
Properly enable Nginx and PHP error logging.

Fixes #17.
Only trigger `erb` if .erb files actually exist.
Suppress user/group directive ignored info messages from php-fpm.

Fixes #19.