Add new app for woodland polygons

This is the start of a feature that will allow users to specify the
number, species and dbh of trees in a given area
Merge pull request #116 from ahinz/topic/polygon-fields

Add new app for woodland polygons
Fix Ban/Activate links that contain duplicate DOM ids

This bug was reported as occurring when the the ban/activate links are
clicked after sorting or filtering:

""" On the users page (http://treezilla.org/users/), administrators
can use the ban? button to the far right of a user name to ban the
person from logging into OTM. If you click the ban button, it becomes
an activate button. If you click the activate button, it makes the
person's inactive account (meaning they never clicked the activation
link in the email) become active.

The problem is that the ban/activate button isn't working if you do
any type of sorting or filtering. It will work on the first page of
user results but any action to change the search results (clicking on
a column header), changing pages, etc makes the button no longer work.
"""

However, it looks like the problem was actually that for some, but not
all users, the DOM element that their data and links lived inside of
contained IDs that also occurred in the species list. jQuery selection
was not working because this was causing invalid HTML. This problem is
fixed by changing the user DOM element to have a class and a data-id
instead of an id attribute.
Fix Ban/Activate displayed option for user edits

The problem was that for users who were labeled "Inactive", a "Ban?"
link was displaying, even though it should have said "Activate?" -
banning is only a valid option for users that are labeled
"Active". The admin was required to first click "Ban?", which would
save the user object without changing it, then click "Activate?" to
produce the desired result.

This is fixed by changing how the initial html template is rendered.
Merge pull request #117 from steventlamb/bug/ban_activate_links

Bug/ban activate links
adding a few missing image files for the default template
adding choices.example.py
Merge pull request #119 from andrewbt/v1.3

adding a few missing default files
Specify a version for threadedcomments
Merge pull request #120 from steventlamb/v1.3

Specify a version for threadedcomments
Fix popover overlap and sizing
Generic error popup
Factor out error namespace.

These aren't really meant to be exported
Updates