Implement IndexAction/Header.ts

- simple View: only open a dialog on click of the (i) icon
Rename cubeviz-header-dialogBox to cubeviz-index-headerDialogBox

and cubeviz-header-questionMarkHeadline to cubeviz-index-headerQuestionMarkHeadline
Begin port existing Visualization system (e.g. HighCharts)
In procress: Begin integration of CubeViz Visualization stuff (HighCharts, CubeViz)
Fully integration of "old" Visualization stuff (HighCharts & Co.)

- adapt as slightly as necessary to make old code runable
- set new div id for HighCharts in ChartsConfig.js.dist