Print to root-file

Added possibility to PrintAllMarginalized to root-file.
For the PrintAllMarginalized1D/2D, I had to add an additional argument to carry the file type, but using a default argument this should not break anything. 
The 1D/2D-only prints methods also allows to print to all sources a TCanvas also can print to, ie png, jpg, xml, ... 
The 2D-Print can not save to .C as root due to many object not having names, a workaround is needed for this, at the moment a root-file is stored instead.