Fix typo trees -> resources and format visibility
Convert benefit_value_row to span instead of dl

So the benefit data appears on one line
Provide default resource basis for eco template

For some reason, template tags are not working correctly within the eco_benefits.html template. Non existent key values are not rendering with a 'default' filter. I thought that any failure would result in a comparitable falsy value, so you can say {{ dictionary.nonexistent_key|default:"empty" }}, but this appears not to work. It is unclear if {% with %} and {% blocktrans %} have anything to do with it.

To sidestep this issue, provide default values.
Merge pull request #1200 from steventlamb/bug/fix_ecobenefit_formatting

Bug/fix ecobenefit formatting