Updates to website after introduction of DataProvider in library

orderFunction => orderingFunction
getData => extractData
Updated website after visual checks against drawing charts with no data
Updated website after merge in library code

Merged 'allow charts to be drawn with no data' and 'manual axis ranges'
Updated website with docs referring to insight.DataProvider
Updated website after library changes allowing charts to draw without data
Fix missing package dependency

- Missing ```grunt-zip```
- Packages reordered by ```npm```.