re-established backwards compatibility for previous 
commit (6009).
"X Name" is now allowed in the sif file again, and if 
"X Dim Name" or "X Var Name" cannot be found then 
"X Name" will be used.


git-svn-id: https://elmerfem.svn.sourceforge.net/svnroot/elmerfem/trunk@6010 35e42291-063b-0410-a9f9-998d8d6728aa