Jarv/xqueue support

specific

Remove the gunicorn role since it no longer exists.

if facter_processorcount is set, use that to determine # lms/cms/etc workers

Create roles for apache and shibboleth that run the lms and

Conflicts:
	playbooks/roles/shibboleth/vars/main.yml

support registration and login via apache + mod_wsgi + mod_shib

Note that we now thing that gunicorn and mod_wsgi should not live
on the same machine if they are running the exact same codebase
with the exact same edx logging directories.  This seems to
cause deadlock at random times

Feanil/edxapp gunicorn

Jarv/edx sandbox

also adding comments

support registration and login via apache + mod_wsgi + mod_shib

Note that we now thing that gunicorn and mod_wsgi should not live
on the same machine if they are running the exact same codebase
with the exact same edx logging directories.  This seems to
cause deadlock at random times

Configured to use localhost for mongo, mysql, memcache

Run only when migrate_db is set which will be the case
for bringing up new instances

This allows you to access services without setting
up subdomains

edx_sandbox for edx-east and an edx_sandbox reference
new launch_instance role for bringing instances up using the ec2 module
new edxlocal role for installing local dependencies