Moving data logic into model function.
Added Error Handling
Merge pull request #31 from cschroed-usgs/NAWQAAN-39

Nawqaan 39
Revert "Merge pull request #31 from cschroed-usgs/NAWQAAN-39"

This reverts commit 894a81b58953d4f597563032e29564dad22f2a71, reversing
changes made to a64f6dd4367e636cd6b0c987c7fd55da77951cd4.
Merge pull request #32 from cschroed-usgs/master

Revert "Merge pull request #31 from cschroed-usgs/NAWQAAN-39"
Merge branch 'master' into NAWQAAN-122

Conflicts:
	nar_ui/views.py
Switched order of average and current year bars. Accounted for different year ranges.
Making units metric
Checkpointing attempts to group graphs by unit label.
Revert "Revert "Merge pull request #31 from cschroed-usgs/NAWQAAN-39""

This reverts commit a2fbbbde9ae75a17327cd712d150fd0a873e2052.
Merge pull request #33 from cschroed-usgs/master

Revert "Revert "Merge pull request #31 from cschroed-usgs/NAWQAAN-39""
Corrected for case with no resulting features.
Merge pull request #34 from cschroed-usgs/master

Corrected for case with no resulting features.
Merge branch 'master' into NAWQAAN-122
Tweaks.