numerous improvements

initial AUTHORS file

setting auto-scaling min/max to 2

* remove capa from requirements, bump versions of dogapi and simplejson
* comment out stuff done to /etc/facter
* comment out pkg_version() b/c it needs  '../version-script/version.py'

Jbau/fix/new requirements files

Attempted to strip out files and tasks we no longer
need.  There is more work to be done

Parameterizing edx git repository location

* Creates global variable $platform_code_dir to store
  /opt/wwc/edx-platform, to replace the semihardcoded /opt/wwc/mitx that
  we had before.
* Plugs $platform_code_dir in a lot of different places
* Templatize sef's update script hack

Until we support autoscaling we should keep min/max
the same.  We might want to make it 1/1.

Jarv/cleanup lms and examples

Feature/jrbl/tagging update install

* update tasks are meant to be the fast ones and the ones we want to be
  sure to always do (directory creations, permissions, etc.)
* install tasks are all the really slow things, like the git repo clone
  and package installations
* Every task can by run by --tags=install,update - which is the same as
  having no tags at all.

Conflicts:

	playbooks/roles/lms/tasks/main.yml

Jbau upstart restart handler

Jbau/lms preview

Use the new mitx repo locale

Nginx log reconfiguration

cleaning up old group_vars files

Documentation improvements, separation of phases, moving toward not usin...

* sends logs to /mnt/logs/nginx instead of /var/log. Note that on fresh
  server startup, nginx will still log to /var/log until it reads its
  configuration.
* Installs logrotate configuration for freshly moved nginx logs
* Some directory and file permissions fixups
* Improved order of operations on nginx installation/bringup

Configure logrotate to treat edx logs appropriately