n/w error 400
commiting sprint 2 changes leftover inorder to create sprint 3
Issue 81:
Material Condition Create - not showing up in the dropdown list
Issue: 33
The Tree view doesnt remember its open state when you go back to it
Issue: 80  , 48:
Move the usergoup.py code to user folder so that we can check for apikey and all groups data link
ISSUE#83

Switch over to the new data model. Delete empty files. A little bit
of code cleanup.
Merge branch 'sprint-3' into ISSUE-83-new-data-model
ISSUE#86

Revert back to previous version.
checked the conditions in
ISSUE#83

Fix to refer to new lower cased name
Merge branch 'sprint-3' of github.com:prisms-center/materialscommons.org into sprint-3
removed all groups data link from home page
Merge branch 'sprint-3' of github.com:prisms-center/materialscommons.org into sprint-3