RFR: JMC-5541: Updating JMC landing page with new coordinates and screenshots

[Guru]

+1 Looks good to me. 

Thanks,
Guru
> On 12-Dec-2018, at 7:19 PM, Marcus Hirt <marcus at hirt.se> wrote:
> 
> Hi all,
> 
> Please review this fix to update the JMC update site landing page and
> images.
> 
> Jira:  https://bugs.openjdk.java.net/browse/JMC-5541
> Patch: http://cr.openjdk.java.net/~hirt/JMC-5541/webrev.0/
> 
> Kind regards,
> Marcus
> 
>