Task #8574: moved dataservice to datacontroller. added methods to convert lists to id-based dicts, which are then used to link the claims and tasks to the resources for gantt view

Task #8574: Render tasks in grid as tree view. Not optimal for user. Let's change this to a task-type-column.

Task #8574: split controller into two: for dataretreival and gridcontrol. Bind them via service. Use in html.

Task #8574: added angular-gantt and dependencies. added gantt chart to view. render the same task data as in table.

Task #8574: moved various js libs into subfolders. added js libs: angular-route angular-touch angular-ui-grid. Used ui-grid to display tasks