A number of small changes:

- made many getters const
- changed many includes in the headers to forward declaration
- removed "const" from non- pointer and ref basic types in function arguments
- added //author lines
- corrected cvs ident line to include "root/foam"


git-svn-id: http://root.cern.ch/svn/root/trunk@11535 27541ba8-7e3a-0410-8455-c3a389f83636