Implement UI-Grid Infinite Scroll

[jkmarx]

In the angular data-set view, implement ui-grid infinite scroll.
http://ui-grid.info/docs/#/tutorial/212_infinite_scroll

[jkmarx]

Dataset Browser Upgrade, Phase 1

[jkmarx]

"Avoid jumpy appearance, you can explicitly save the scroll position before you add data to your data array, through calling saveScrollPercentage, and the dataLoaded call will then take that position into account, and attempt to adjust the scroll so that the same rows are showing once the grid has ingested the data you have added."

[jkmarx]

"If you are using external sorting or external filtering you may reload your data whenever scroll or filter events occur. In this situation you'll want to call resetScroll to tell the grid not to try to preserve the previous scroll position. "

[jkmarx]

The bug was due to the routing and tabs. The ui-grid was being initialized twice, so there were two grids in the scope causing issues. To correct it, the default address for dataset2 is http://192.168.50.50:8000/data_sets2/uuid/#/files/browse. http://192.168.50.50:8000/data_sets2/uuid/# will reroute to the above address. http://192.168.50.50:8000/data_sets/uuid/#/ is fine though for the meanwhile.