Using Cmd+Scroll to zoom on a mac

[samelhusseini]

Issue microsoft/monaco-editor#201

Bug
Cmd + Scroll doesn't work on a mac. Only Ctrl+Scroll.
Most mac users would be used to using Cmd instead of Ctrl.

Fix
Zoom on both Ctrl+Scroll and Cmd+Scroll (metaKey).

closes microsoft/monaco-editor#201

[msftclas]

Hi @MicrosoftSam, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

It looks like you're a Microsoft contributor (Sam El-Husseini). If you're full-time, we DON'T require a Contribution License Agreement. If you are a vendor, please DO sign the electronic Contribution License Agreement. It will take 2 minutes and there's no faxing! https://cla.microsoft.com.

TTYL, MSBOT;

[coveralls]

Coverage remained the same at 61.19% when pulling fdf635d on microsoftsam:master into 7baf009 on Microsoft:master.

[alexdima]

👍 Thanks!