Merge pull request #96 from kbornhorst/patch-8

Update itree_import.py
Style list and status view for importer, adjust placement of popovers for errors
Merge branch 'master' of git://github.com/azavea/OpenTreeMap into topic/importer-styling
Merge branch 'v1.3' of git://github.com/azavea/OpenTreeMap into topic/importer-styling
Merge pull request #126 from azavea/topic/importer-styling

Importer List/Status Styling