Merge pull request #51 from dildick/master

option to use different geometries
Merge pull request #52 from dildick/master

addition of PyROOT AND and OR
Merge pull request #53 from dildick/master

use of AND and OR
silent plotting in C
Merge pull request #54 from dildick/master

std correctness
Merge branch 'master' of git://github.com/gem-sw/GEMCode
clean-up