-add Ones, DiagonalMatrix, DiagonalCoeffs

-expand and improve unit-tests
-various renaming and improvements

test/main.h

@@ -116,7 +116,7 @@ class EigenTest : public QObject
     void testBasicStuff();
     void testAdjoint();
     void testSubmatrices();
- 
+    void testMiscMatrices();
   protected:
     int m_repeat;
 };