Merge pull request #253 from ScottLogic/gh-pages-dev

Merge gh-pages-dev into gh-pages for version 1.2.0 release
Created basic getting started page
Fix missing package dependency

- Missing ```grunt-zip```
- Packages reordered by ```npm```.
Merge pull request #258 from matthewdunsdon/web-fix-package-json

Fix missing package dependency for Website
Updated website after changes to Grouping calculated property names

Sum => sum
Total => total
Average => mean
Count => count
Updated docs for Dimension and Grouping
Updated change log
Updated website after Grouping documentation updates
Fixed mistakes in change log
Added content to getting-started page
Merge remote-tracking branch 'upstream/gh-pages-dev' into feature/getting-started-page
Improved content and fixed spelling errors in getting started page
Replaced total with totalCount in result of counting Grouping properties
Updated getting started chart to not use groupings
adding theme demo page
Updated getting started guide instructions
Merge pull request #261 from niksoper/gh-pages-dev-review-groupings

Updated website after review of groupings
Renamed duplicate controller: GettingStarted => GettingStartedWithGroupings
Using API link to insight.DataSet
Added JSFiddle link