Merge pull request #1 from dabercro/master

Adding two and three variable scripts
	new file:   MutualInfoNVars.C
Implemented NVars - might not work yet; taking to lxplus for testing
Implemented arbitrary-dimension mutual info with truth. Default config file provided
deleted some debugging stuffwq
Merge remote branch 'upstream/master'

Conflicts:
	MutualInfoSingleVar.C
git merge messed up some files; no real edits here
avoided log(small positive number)=-inf; fixed some bugs which arose from hard-coded constants
Merge pull request #1 from sidnarayanan/master

N-variable mutual info with truth implemented and tested