Added nicer way to run dev commands

Made a new directory that contains commands to do common tasks with
the dev environment.

The system works similarly to virtualenv.  You source the activate
script, which adds the directory to your path.  When you're done you
run deactivate.

Features include:
  - You can run the commands from any directory
  - Less typing
  - Quick way to start up a bash prompt

Also removed a couple scripts that had to do with vagrant.  I don't
think we plan on supporting that stuff anymore.
Renamed test script

We can't have the script named "test" because that's a bash builtin.
Add analytics to the subtitle editor

Moved the analytics code block into a separate template and included
that from subtitle-editor.html.

Simplified the cases for when we don't use analytics because we're
running from dev or something.  Before we sometimes would set up the
code, but not include the script.  Or we might include the github CSS
and highlight JS.  Both of these things seemed pretty weird, now
we either show the analytics, or show a comment instead.
Added analytics to embedder
Added new analytics code

This is the new recommended code.

Removed Loading the script at
http://cdn.optimizely.com/js/12019399.js
I have no clue what that's supposed to be.  I'm guessing it's just a
minified version of the old analytics.
Embedder has the option to disable analytics tag, to be used on amara.org to avoid counting pages twice. Also removed duplicated tag in analytics template, and deleted unused templates
Indicate if language is original in selector
Merge pull request #1626 from pculture/analytics

Analytics
update a few tests for the ref lang wording change
Merge pull request #1628 from pculture/gh-1573

Gh 1573
Bunch more dev changes

Added a stop-services command.

Removed a bunch of old stuff that we don't use anymore.  Most was
related to vagrant or docker-dev-environment.  Fig does everything
better than those.  Also removed the very peculary g.dot file.
Merge remote-tracking branch 'origin/staging' into dev
Added dev command to show server_local_settings.py
Added dev command to start the app
Move startup code to 1 place (#1605)

Created a module to handle all startup and have deploy/unisubs.wsgi
and manage.py call into it.

This should basically result in the same code being run, but there
were a couple changes:
  - unisubs.wsgi: No longer add ../env/lib/python2.6/site-packages as
    a site dir.  I think this is a relic of previous setups.  For
    starters, we're on python 2.7 now.
  - both: set CELERY_LOADER to amaracelery.loaders.AmaraCeleryLoader.
    This is the loader that we want to use and it might have even been
    the one that we were actually using before because we set it up in
    apps/amaracelery/__init__.py
Merge branch 'dev' into newmedia

Conflicts:
	templates/embedder-iframe.js
	templates/index.html
Merge branch 'gh-1605' into newmedia
Setup STATIC_URL on startup

With the new media setup, STATIC_URL is dynamic so we can't just put
it in the settings file.  Instead, the staticmedia.startup module sets
the value.

Upload admin media in the send_to_s3 command.
Remove STATIC_URL from settings files

Since we set it in staticmedia.startup we don't need to put it in the
settings files.

Also remove COMPRESS_URL, I believe that's a django-compressor setting
and we aren't using that either.

Removed docker_dev_settings and dev_settings_selenium.  I don't think
we use these anymore.