Little fix I added while learning about MODULES. Changed the histo range so that it tracks values below 0, which are quite common.
Make it clear the relative startpoint for a module TargetDirectory.
Also reformat Usage message to fit nicely in 80char  terminals
Merge branch 'develop' of github.com:alcap-org/AlcapDAQ into develop

Changes should be pretty orthogonal to anything else but git doesent say what they are.