replace q method calls with bluebird ones

```
find src test -name '*.js' |
    xargs perl -i -pe 's/q\.(all|defer|reject|delay|try|isFulfilled)\(/Promise.$1(/'
```

src/components/views/dialogs/ChatInviteDialog.js

@@ -498,7 +498,7 @@ module.exports = React.createClass({
         }
 
         // wait a bit to let the user finish typing
-        return q.delay(500).then(() => {
+        return Promise.delay(500).then(() => {
             if (cancelled) return null;
             return MatrixClientPeg.get().lookupThreePid(medium, address);
         }).then((res) => {