/deep/ and ::shadow are removed from the .css

The component css contains:

```
.progress /deep/ #primaryProgress {
  background-color: #ff9500; }
```

which gets transformed into

```
.progress[_ngcontent-iyr-3]   #primaryProgress[_ngcontent-iyr-3] {
  background-color: #ff9500; }
```

which doesn't work as it needs to pierce the shadow boundary to style the element with the 'primaryProgress' id.
