Ci improvement

I couldn't figure out how to source scripts in the gitlab ci yaml file so I had to create a "do_build" script which does everything.

bin/do_build

+#!/bin/bash
+ps
+source /usr/local/bin/thisroot.sh
+source /usr/local/bin/thisdd4hep.sh
+source /usr/local/bin/geant4.sh
+mkdir install
+mkdir build
+cd build
+cmake .. -DCMAKE_INSTALL_PREFIX=../install
+make -j4