chore: update clean and sass tasks to cover examples
chore: update clean and sass tasks to cover examples

paulussup/ng2-material,dmacfarlane/ng2-material,Q-Free-OpenRoads/ng2-material,Q-Free-OpenRoads/ng2-material,mailiam/ng2-material,dmacfarlane/ng2-material,dmacfarlane/ng2-material,parmalatinter/ng2-material,mailiam/ng2-material,paulussup/ng2-material,Q-Free-OpenRoads/ng2-material,parmalatinter/ng2-material,paulussup/ng2-material,Q-Free-OpenRoads/ng2-material,mailiam/ng2-material,parmalatinter/ng2-material