Fix typo
Merge pull request #819 from maurizi/fix/560/notAvailableText

Fix typo in instance_not_available.html
Include contents of static file version.txt as header comment in all pages

* File treemap/static/version.txt has a default header comment
* Build systems can overwrite this file with specific info about the build
* base.html template inlines it as a header comment
* The file can also be referenced from a browser as http://<site>/version.txt
Merge pull request #806 from RickMohr/version-info-header

Include contents of static file version.txt as page header comment
Pin eco.py requirement to fix tests
Don't hide/cancel tree counts with ecobenefits

fixes #813 on github.

A previous commit, 99c236aad3965e0dac1b601ca1b70fd59b451684, removed ecobenefits for cases where the instance does not overlap an itree region. This incorrectly disabled tree counts along with it. This commit re-enables tree counts.
Add explanation text when eco turned off

fixes #799 on github.
Merge pull request #820 from steventlamb/bug/813/dont_hide_tree_counts

Bug/813/dont hide tree counts
Fix whitespace
Add benefit currency conversion data from iTree XML files
Modify ecobenefits to use currency conversion in eco.py
Change BenefitCurrencyConversion to use eco.py currency conversion

Changes model fields to be in line with underlying eco.py factors.

Pushes currency conversion (but not formatting) logic out of the view and
into the ecobenefits helper function.

Adds migrations to drop all existing models and replace them with the
default values for that instance's location.
Update the version of eco.py used