Allow VariableGroup to group scalar variables together
Get the right variable name when querying SCALARs

via a wrapped function
Merge pull request #31 from andrsd/var-group

Allow VariableGroup to group scalar variables together
Merge branch 'master' of github.com:libMesh/libmesh
TOLERANCE would be namespaced and easier to debug with if it was a
static const rather than a macro