First version with pixeltype=double for actors using GateImageWithStatistic
Add GateImageInt and write double image as float
Merge branch 'develop' into doubleImage
Correct tps source
Merge branch 'develop' into doubleImage

Conflicts:
	source/digits_hits/include/GateImageWithStatistic.hh
Merge branch 'develop' into doubleImage
Merge branch 'develop' into doubleImage
indent
Merge branch 'develop' into doubleImage
Correction to  only write squared image once.
Correct memory bug.
Add timing info (PPS, TPS, SPS)
Merge branch 'develop' into doubleImage
Add spot selection (Brent)
cosmetic
Code: mu/muen as a function of the material/cut couple instead of material
Code: add more adapted 'get' functions
Merge branch 'develop' of git.creatis.insa-lyon.fr:opengate-creatis into develop
Correct unity (CLHEP::g and CLHEP::cm3)
Merge remote-tracking branch 'opengate-official/develop' into develop