Use cartoonish duck instead of dog for import image layer
Fix import image icon file
Polish time track panel icon by add some more details
Update value node (link) icon
Fix ease waypoint icon by add two straight lines
Fix lines position for ease waypoint icon on time track panel
Update waypoint icons with tango color palette on time track panel
Apply tango dark(Aluminium) for waypoint icons outline
Merge pull request #85 from morevnaproject/master

Apply icons by Yu Chen