added useful .gitignore files

.gitignore

+/Makefile
+/.cproject
+/.project
+/.settings/
+/InstallArea/
+/build.*/
+/.pydevproject

Geant4/G4FR/.gitignore

+/FukuiRenderer/
+/G4FR/

Geant4/G4GDML/.gitignore

+/G4GDML/
+/schema/
+/src/

Geant4/G4OpenGL/.gitignore

+/G4OpenGL/
+/OpenGL/

Geant4/G4RayTracer/.gitignore

+/G4RayTracer/
+/RayTracer/

Geant4/G4Tree/.gitignore

+/G4Tree/
+/Tree/

Geant4/G4UIGAG/.gitignore

+/G4UIGAG/
+/GAG/

Geant4/G4UIbasic/.gitignore

+/basic/
+/G4UIbasic/

Geant4/G4UIcommon/.gitignore

+/common/
+/G4UIcommon/

Geant4/G4VRML/.gitignore

+/G4VRML/
+/VRML/

Geant4/G4analysis/.gitignore

+/G4analysis/
+/src/

Geant4/G4digits_hits/.gitignore

+/detector/
+/digits/
+/G4digits_hits/
+/hits/
+/scorer/
+/utils/

Geant4/G4event/.gitignore

+/G4event/
+/src/

Geant4/G4examples/extended/electromagnetic/G4TestEm3/.gitignore

+/include/
+/src/
+/TestEm3.cc

Geant4/G4examples/extended/electromagnetic/G4TestEm5/.gitignore

+/include/
+/src/
+/TestEm5.cc

Geant4/G4examples/extended/electromagnetic/G4TestEm7/.gitignore

+/include/
+/src/
+/TestEm7.cc

Geant4/G4examples/extended/electromagnetic/G4TestEm9/.gitignore

+/include/
+/src/
+/TestEm9.cc

Geant4/G4examples/extended/hadronic/G4Hadr00/.gitignore

+/Hadr00.cc
+/include/
+/src/

Geant4/G4externals/.gitignore

+/G4externals/
+/externals/

Geant4/G4geometry/.gitignore

+/biasing/
+/divisions/
+/G4geometry/
+/magneticfield/
+/management/
+/navigation/
+/solids/
+/volumes/