replace imports of q with bluebird

update `package.json`

```
find src test -name '*.js' |
    xargs perl -i -pe 'if (/require\(.[qQ].\)/) { $_ = "import Promise from '\''bluebird'\'';\n"; }'

find src test -name '*.js' |
    xargs perl -i -pe 'if (/import [qQ] /) { $_ = "import Promise from '\''bluebird'\'';\n"; }'
```

src/vector/index.js

@@ -65,7 +65,7 @@ var sdk = require("matrix-react-sdk");
 const PlatformPeg = require("matrix-react-sdk/lib/PlatformPeg");
 sdk.loadSkin(require('../component-index'));
 var VectorConferenceHandler = require('../VectorConferenceHandler');
-var q = require('q');
+import Promise from 'bluebird';
 var request = require('browser-request');
 import * as UserSettingsStore from 'matrix-react-sdk/lib/UserSettingsStore';
 import * as languageHandler from 'matrix-react-sdk/lib/languageHandler';