[DISCUSS] FLIP-7 Expose metrics to WebInterface

[Chesnay Schepler]

Hello,

I just created a new FLIP which aims at exposing our metrics to the 
WebInterface.

https://cwiki.apache.org/confluence/display/FLINK/FLIP-7%3A+Expose+metrics+to+WebInterface

Looking forward to feedback :)

Regards,
Chesnay Schepler