Added getters for extensions to volumes and nodes
Also check with CINT if we have autoloading information
Add TInterpreter::SetClassSharedLibs

This new routines allows to add manually autoloading information
to ROOT's view.   This is usually done by writing an external
rootmap file.
Prevent out-of-bounds access when switch from Read to Write mode

Since commit 8cdc3567 (svn revisio 27845), the TBuffer only reserve
space for the free block count when it write mode.  If we switch
from write to read and vice et versa, we need to make sure it
is recorded consistently.
   o RooLinkedList, RooLinkedListElem

     - Move helper classes into namespace instead of nested class
       to be able to solve AIX compilation issues

   o LinkDef3,4

     - Split LinkDef file to fix windows dictionary compilation issues
Merge branch 'v5-34-00-patches' of https://root.cern.ch/git/root into v5-34-00-patches
make sure that source archive always untars in root/.