One should use the right package name in a REAME.

Damn copy and paste and (not intelligent enough) meld.

[[Imported from SVN: r834]]

README

@@ -15,7 +15,7 @@ Differences. Through separation of data structures DUNE allows fast Linear
 Algebra like provided in the ISTL module, or usage of external libraries
 like blas.
 
-This package contains the basic DUNE common classes.
+This package contains the basic DUNE istl classes.
 
 Dependencies
 ------------