the grid renders with new rowcache model
searching and scrolling works
sorting works.
simplified virtualization logic.
Fixed cell selection. Fixed ui-if bug.

Added $scope.$on for sending digest requests.
fixed grouping.
Fixed single select scrolling.
adding PR#136 to source files.

also adding modelIndex for lookup to user's model.
maintain selections when sorting or pushing.
Updating to 1.8.

Major architectural improvements.
fixing placement of filter evaluation
Rebuild
Merge pull request #139 from angular-ui/rearch

Rearch to 1.8.0