Email Signups AB test

# Email Signups AB test

### This code adds an AB test for the Email Subscription signup modules for article pages.

There are 7 variants;

control - nothing
email-signup-inline - below article (see pic)
email-signup-inline-alt - as above with alternate styling (see pic)
email-signup-left-body - at left hand side aligned with start of article body text (see pic)
email-signup-left-body-alt - as above with alternate styling (see pic)
email-signup-left-meta - as left body but aligned with meta block (higher up)
email-signup-left-meta-alt - as above with alternate styling

Currently the test takes in 0.08 of traffic and splits evenly between the 7 tests.

The test is currently scheduled to expire on 2014-01-15

You must also be logged in to see the test.

# Pics

![email-inline-alt](https://f.cloud.github.com/assets/1170410/1869513/9a47c50c-787b-11e3-8f59-ddfd1458a024.png)
![email-inline](https://f.cloud.github.com/assets/1170410/1869514/9a486494-787b-11e3-81bc-57d8f12a78b0.png)
![email-left-body](https://f.cloud.github.com/assets/1170410/1869515/9a486e08-787b-11e3-845a-5e3d72e99043.png)

![muhwvv4](https://f.cloud.github.com/assets/1170410/1869616/7aa667e8-787c-11e3-93b5-890c10079dcb.gif)