Add in itree code field and update to eco.py 0.0.2

The big change in eco.py 0.0.2 is support for bulk eco benefits, so most
of the changes in this commit are related to reorganizing the
ecobenefits module to properly send data back and forth
PTM data corrupts this column, just fix it to a value
Merge pull request #77 from ahinz/topic/update-ecopy

Add in itree code field and update to eco.py 0.0.2