Fix error in R call with optional parameter

Fix error included in 963fea40dff8c7ce8e7b51b2abdc59061bef2cc5
that passed ITS type parameter to all R scripts when it shouldn't.
Replace hardcoded limit for top functions with parameter conf$npeople
Add parameter conf$npeople for all Top function calls
Merge branch 'master' of github.com:VizGrimoire/VizGrimoireR

Conflicts:
	vizgrimoire/R/ITS.R