Use of Global variables in $V, $L, $M, $P node package 

Is there a reason that $V ,$L, $M, $P are in global scope? This is currently causing issues when testing with mocha, so we are having to add these to the mocha --globals option. Since everything is being exported it would seem like the attachment to global variable isn't required.

I assume there may be a very good reason for this but doesn't seem like best practice?
