Merge pull request #188 from hanneskaeufler/hk-add-tests

add basic tests
Add a getter on the Highcharts chart object
Merge pull request #1 from ValentinH/Highcharts-object-reference

Add a getter on the Highcharts chart object
Added setup instructions
Update highcharts-ng.js

Possibility to set loading text
build dist files
Add a block about the getHighcharts helper
Merge pull request #210 from ValentinH/master

Add a getter on the Highcharts chart object
Loading option

Loading option could be a boolean or a text.
Merge pull request #219 from JesLabs/master

Add ability to set loading text
allow the use of highmaps