Standarize on 'content' for all templates

I attempted this standardization in 4d9bd8d2. Looks like I missed
these 2.
Remove "interactivity" for UTF grid requests as it's now handled by tile server

Also move createPlotUTFLayer() closer to its friends
Merge pull request #110 from RickMohr/remove-interactivity

Remove "interactivity" for UTF grid requests (now handled by tile server)
Read UTF grid plot ID key from config

The name of the plot id field in the UTF grid changed, so rather than
just update it, I moved the field name out to settings.js.
Add management command to import otm1 data
Merge pull request #94 from steventlamb/topic/more_dev_data

Add management command to import otm1 data
Force tree layer to refresh on filter change

Without {force: true} the layer was not updating until the map was
panned or zoomed.
Merge pull request #112 from jwalgran/fix/force-layer-refresh

Force tree layer to refresh on filter change
Merge pull request #111 from jwalgran/fix/utf-plot-id

Read UTF grid plot ID key from config
Set up login/logout and profile redirect

Django auth, by default, redirects a successful login to
/accounts/profile/. I set up a redirect from /accounts/profile/ to
/users/{logged-in-users-username} so that we have a consistant URL
for viewing both the page for the logged in user and any other user
page.

If a user is not logged in /accounts/profile/ redirects to
settings.LOGIN_URL
Merge pull request #108 from jwalgran/topic/login-workflow

Login workflow