YAML style parameters passing

rewrite the edxapp role

Improvements to django_admin.sh

- Echo the command to run before running (for post-mortem debugging)
- Stop adding "--settings aws" to the end of every command, even when it
  was added to $manage earlier

Add another region to ec2.py

This appears to be the only way to ask it to look in multiple regions
since it doesn't support AWS_REGION or --region.
Alternately, we could start having independent .ini files for deploys.

MAYN-281: Update edx-configuration to support multiple theme directories

use the YAML style parameters

YAML style parameter passing

YAML style parameters

use the YAML style parameter passing

use the YAML style parameter passing

psmisc isn't on precise docker images and the jenkins roles want it.

Dockerfile for the jenkins_analytics role

Adds the memcache to all playbooks using edxlocal

Additional configuration needs to be completed (analytics jobs in public
repo, and test config files in a public repo) and then travis should be
able to start using this with minimal extra configuration.

Enable splunk-server role to manage dashboards

edx_sandbox.yml: Run edxlocal role only if edxapp db is on localhost

* Makes the mysql role a dependency of edxlocal
* Moves memcached install into new role
* Installs memcached if EDXAPP_MEMCACHE contains localhost

It is part of the default AWS AMI though, which is why we haven't
noticed.

Whitelisting future_builtins.so for matplotlib

Clean up /edx/var/edxapp/staticfiles before paver runs

When running on a dirty image (such as a sandbox base image or an AMI
build) this clears static files so that collectstatic will copy
everything.

Django's collectstatic copies files and doesn't preserve timestamps,
then only copies "newer modified files".  This leads to a condition
where old static files are in /edx/var/edxapp/staticfiles with a
timestamp of Yesterday, and we add a new dep which comes down from npm
with a timestamp of last week.  Collectstatic will not copy those.

Revert "Revert "WL-451: Clean up ansible services/roles for theming""

use the YAML style parameter passing instead of old style module calls

Arbab/edxapp main rewrite

Feanil/upgrade gocd