Added Chart Demos

[MarielaTihova]

Related to IgniteUI/grid-demos#126

Implementation of Chart Demos Pages.

Unfortunately it is a big PR because of the many new components and views. I have pushed things into smaller commits for easier tracking.

• To run charts, go to home/charts/column-chart (or any of the chart names at the last position of the URL)
• You can also see each chart page separately outside of home/ on charts/column-chart (or any of the chart names at the last position of the URL)
• There is no button or anything leading to these pages. You have to manually type the URL

What is left (After further clarifications from Marketing and UX teams)

1. Download links for each chart
2. Possible changes on fonts and colors for the headers
3. Possible changes on the design about chart tabs (Up to this moment designs for charts other than Line/Area chart are missing. As agreed upon with the UX team they have been implemented as we (the dev team) see suitable).