Adding example for hidden grids
Adding example for multiple grids on a page
Give header row a gradient background
Minor cleanup, add headerTemplate options, expose refreshCanvas to scope
Adding custom header template functionality
Updating tutorials
Merge branch '3.0' of https://github.com/angular-ui/ng-grid into 3.0

Conflicts:
	src/js/core/directives/ui-grid.js
Update Large Dataset example with more data