Add queue-async to bower file

best small tool for getting multiple data sources async and return when
all are ready
use queue-async to get all needed data

get data in one place, wait for all data to be loaded before continuing
streamline computedObservables

use self instead of this
since self is defined earlier and used instead of this
use self here too
Add GMI Rank

calculate GMI rank from cdv data file
introduce new class GMI for calculation and scales
Add GMI to Layers and show 5 class colors for each country

gmi index is quantizied in five classes
colors from colorbrewer:
http://colorbrewer2.org/?type=sequential&scheme=YlOrRd&n=5
Remove old colors
Merge pull request #12 from okfde/8-gmi-overlay

8 gmi overlay