Code review comment for lp:~maddevelopers/mg5amcnlo/HEPToolsInstallers_dev

Note that revision 109 change a lot but at the same time,
it actually is mainly identation and adding
if "__main__" == __name__
at couple of place.
The reason is that I want to be able to do
import HEPToolsInstaller
and not run the code.
So this is in principle harmless.