Merge branch 'master' into dev
#196, implement CSV export for concentration timeseries
Fix whitespace in Gruntfile
fix gruntfile to watch vendor JS
#206, default margins improved on open water chart
#189, reduce build size & enable gzip
#189, add app loading indicator
Merge pull request #204 from ua-snap/export_csv

#196, implement CSV export for concentration timeseries
Merge pull request #210 from ua-snap/tame_bandwidth_needs

Tame bandwidth needs
Merge dev into fix_graphic_margins.
small documentation changes in readme
Merge branch 'dev' of github.com:ua-snap/sea-ice-atlas into dev
Merge branch 'dev'