cleaning up old group_vars files

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

Configure logrotate to treat edx logs appropriately

* Bugfix to rsyslog configuration; configuration file had missing
  extension
* Logrotate recipes for edx log files
* Files reorganized, renamed

temporary software update script

comment out lms env vars that should be demo only

Configure rsyslog to catch logs from edx

* Touches directories and files into existence expected during setup for
  LMS and CMS
* Configures rsyslog to catch local0 and local1 from edx, and route into
  the appropriately named files in the appropriately named
  subdirectories
* Permissions updates to ensure rsyslog can write everywhere it's
  supposed to
* Restarts rsyslog after reconfiguration is complete

Until we get proper software updates working we need a script we can run
to orchestrate installs -- checkouts, collectstatic, restarts.  Tagged
with the "update" tag.  Just puts the file out there for now, doesn't
actually do any updates, that should be done with something like this:
    ansible GROUPNAME -i ./ec2.py -c ssh -s -a edx-update.sh

Jbau/cms

creates /opt/wwc/data

enable passwordless sudo for everyone in "adm" group

Permissions issues found during standup

Feature/jrbl/prod cleanups

* Rename auth_config and env_config to be specific to LMS and CMS
* Minor CMS configuration cleanups elsewhere

* Move sudo:True out of each task and into the playbook, since it's a
  playbook-level variable
* Removal of a couple debian package installs from common that are also
  being installed in the role where they're needed
* Re-correction of /etc/git-identity permissions
* Other cleanups (whitespace issues, etc.)

* Removes HTTP basic auth

* Enable npm role
* Minor edits to debian dependency list
* Change treatment of a few files and directories

* Needs more work, but seems to have many of the basics.

fixed some typos in the README.md file.

Jbau/email tz

Add tagging for ruby tasks, also set PATH so that manual work on

instances is a bit easier.
Also subsumes @sefk's  https://github.com/edx/configuration/pull/42

cloudformation: open tcp/9418 for git

Jarv/better elb rolling