Created a make_web_conf command.

The current wsgi does not support virtualenvs (in some distributions, the
dependencies may conflict with the distribution's python packages/dependencies
and would require a virtualenv even in production).
Also, making an apache web configuration is not always trivial especialy
with ssl.
This "make_web_conf" command creates a wsgi with automatic virtualenvironment
detection (if there is a virtualenvironment), and creates an apache
(normal or ssl) configuration

TODO(ygbo)::

    - add nginx support to generate nginx configuration files.
    - add gunicorn support.
    - add uwsgi support.

implements bp web-conf-generation-script

Change-Id: I6397ba01df88b540bbdca4bf21ba90be6843022a
Merge "Created a make_web_conf command."