* Demographics page:
* Show percents with up to 1 decimal place of precision.
* On tablets+ align the percent text to the right.
* On photo counts, only include certified active user photos.
* On gender/orientation demographics, pad the remaining "No answer" counts
with the set of users who have no profile_fields set in the database yet.
* Admin certification page:
* Add additional "common rejection reasons"
* Add a confirm prompt when viewing the Rejected list to avoid accidental
approval of previously rejected cert photos.
Adds two new features to collect and show useful analytics.
Usage Statistics:
* Begin tracking daily active users who log in and interact with major features
of the website each day, such as the chat room, forum and gallery.
Demographics page:
* For marketing, the home page now shows live statistics about the breakdown of
content (explicit vs. non-explicit) on the site, and the /insights page gives
a lot more data in detail.
* Show the percent split in photo gallery content and how many users opt-in or
share explicit content on the site.
* Show high-level demographics of the members (by age range, gender, orientation)
Misc cleanup:
* Rearrange model list in data export to match the auto-create statements.
* In data exports, include the forum_memberships, push_notifications and
usage_statistics tables.
