Add missing include statements.
With FairSoft apr21 and/or FairRoot v18.6.2 some implicitly included
header files aren't found any longer. Add include statements for these
header files explicitly.

Apply code formatting to all source/header files and root macros.

This version is an exact copy of the last revision of the trunk branch
of the old SVN repository of CbmRoor at
https://subversion.gsi.de/cbmsoft/cbmroot/trunk
The old SVN repository will still be available for read access.