Fix for 'Obserable.fromEvent is not a function'.

[bababrownbear]

This change is 

[nader-eloshaiker]

I am very appreciative of this pull request, is there any way to move this review along quicker so that is can be published? Would appreciate it even more :)

[Frozen-byte]

on npm run build I still get the error:
• TS2305 - src/lib/core/overlay/scroll/scroll-dispatcher.ts(5,21): Module '"/home/md2/node_modules/rxjs/Rx"' has no exported member 'fromEvent'.

you may import
import {Observable} from 'rxjs/Observable';
import { fromEvent } from 'rxjs/observable/fromEvent';

[basemmerink]

It looks like the MD2 project is dead.
You can follow this link for a hacky workaround for this error

[EL-Yapany]

As a work arround :
Go to: node_modules\md2\core\overlay\scroll\scroll-dispatcher.js
line 13 : import { Observable } from 'rxjs/Observable'; replace with : import { Observable } from 'rxjs';