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(/'
```

test/components/structures/ScrollPanel-test.js

@@ -74,7 +74,7 @@ var Tester = React.createClass({
     /* returns a promise which will resolve when the fill happens */
     awaitFill: function(dir) {
         console.log("ScrollPanel Tester: awaiting " + dir + " fill");
-        var defer = q.defer();
+        var defer = Promise.defer();
         this._fillDefers[dir] = defer;
         return defer.promise;
     },
@@ -94,7 +94,7 @@ var Tester = React.createClass({
     /* returns a promise which will resolve when a scroll event happens */
     awaitScroll: function() {
         console.log("Awaiting scroll");
-        this._scrollDefer = q.defer();
+        this._scrollDefer = Promise.defer();
         return this._scrollDefer.promise;
     },
 

test/components/structures/TimelinePanel-test.js

@@ -147,18 +147,18 @@ describe('TimelinePanel', function() {
             if(!panel.state.forwardPaginating)
                 return Promise.resolve();
             else
-                return q.delay(0).then(awaitPaginationCompletion);
+                return Promise.delay(0).then(awaitPaginationCompletion);
         };
 
         // helper function which will return a promise which resolves when
         // the TimelinePanel fires a scroll event
         var awaitScroll = function() {
-            scrollDefer = q.defer();
+            scrollDefer = Promise.defer();
             return scrollDefer.promise;
         };
 
         // let the first round of pagination finish off
-        q.delay(5).then(() => {
+        Promise.delay(5).then(() => {
             expect(panel.state.canBackPaginate).toBe(false);
             expect(scryEventTiles(panel).length).toEqual(N_EVENTS);
 
@@ -279,7 +279,7 @@ describe('TimelinePanel', function() {
         // helper function which will return a promise which resolves when
         // the TimelinePanel fires a scroll event
         var awaitScroll = function() {
-            scrollDefer = q.defer();
+            scrollDefer = Promise.defer();
 
             return scrollDefer.promise.then(() => {
                 console.log("got scroll event; scrollTop now " +

test/components/views/dialogs/InteractiveAuthDialog-test.js

@@ -110,7 +110,7 @@ describe('InteractiveAuthDialog', function () {
             );
 
             // let the request complete
-            return q.delay(1);
+            return Promise.delay(1);
         }).then(() => {
             expect(onFinished.callCount).toEqual(1);
             expect(onFinished.calledWithExactly(true, {a:1})).toBe(true);

test/components/views/rooms/MessageComposerInput-test.js

@@ -47,7 +47,7 @@ describe('MessageComposerInput', () => {
         // warnings
         // (please can we make the components not setState() after
         // they are unmounted?)
-        Q.delay(10).done(() => {
+        Promise.delay(10).done(() => {
             if (parentDiv) {
                 ReactDOM.unmountComponentAtNode(parentDiv);
                 parentDiv.remove();