Task #9607: (work by ruud beukema, commit by schaap) Added visual indication to tasks that are blocked by predecessors, and added functionality for selecting them (e.g. for rescheduling)

Task #9607: added anguler-materials module. Use md-tabs for tasks/resources. Only update gantts when enabled in tabs

Task #9607: draw gantt project task rows in same order as grid, add row in case of overlapping tasks

Task #9192 and #9580 and #9581: fixes for filtering of tasks and responsiveness of loading/filtering data

Task #9351: merged branch Webscheduler-Task9349 (c34667) via trunk into this branch because I need the angular contextmenu which was developed there

Task #9349: made contextmenu plugin for gantt. call copyTask via dataservice via webservice on menu click.

Task #8887: added zooming and panning in time. cache series visibilities in charts. double click to focus on task

Task #8887: sync time from server to webclient, and show lofar time in web client as string and in gantt