Integrate mocha istanbul module to display code coverage

[jeffeland]

Mocha Istanbul could allow to display code coverage as follow :
Statements : 100% ( 83/83 )
Branches : 100% ( 24/24 )
Functions : 100% ( 23/23 )
Lines : 100% ( 83/83 )
Ideally, it would color the lines tested in the editor.
An example here : https://github.com/jeffeland/jscoderetreat4

[wolframkriesing]

it would actually be pretty cool having this rigth in ACE, looking like this https://gotwarlost.github.io/istanbul/public/coverage/lcov-report/istanbul/lib/cli.js.html
no idea if there is an ACE plugin already.

[wolframkriesing]

If you don't mind, I will move this into trello so it can be discussed and voted on.
I would like to keep ideas, feature suggestions, etc. out of github issues, so they can be used for "required fixes" instead of throwing ideas around. ok?